update frontend ref

CMakeLists.txt

@@ -170,6 +170,7 @@ add_definitions(
         -DICACHE_FLASH_ATTR=
         -DICACHE_RODATA_ATTR=
         -DFLAG_GZIP=2
+        -DESP_LANG="en"
 
         -DGIT_HASH_BACKEND="asdf"
         -DGIT_HASH_FRONTEND="asdf"

Makefile

@@ -62,6 +62,10 @@ LIBS		= c gcc hal phy pp net80211 wpa main lwip crypto
 #Add in esphttpd lib
 LIBS += esphttpd
 
+ifndef ESP_LANG
+ESP_LANG = en
+endif
+
 # compiler flags using during compilation of source files -ggdb
 CFLAGS		= -Os -std=gnu99 -Werror -Wpointer-arith -Wundef -Wall -Wl,-EL -fno-inline-functions \
 		-nostdlib -mlongcalls -mtext-section-literals  -D__ets__ -DICACHE_FLASH \
@@ -69,7 +73,7 @@ CFLAGS		= -Os -std=gnu99 -Werror -Wpointer-arith -Wundef -Wall -Wl,-EL -fno-inli
 
 CFLAGS += -DGIT_HASH_BACKEND='"$(shell git rev-parse --short HEAD)"'
 CFLAGS += -DGIT_HASH_FRONTEND='"$(shell cd front-end && git rev-parse --short HEAD)"'
-CFLAGS += -D__TIMEZONE__='"$(shell date +%Z)"'
+CFLAGS += -D__TIMEZONE__='"$(shell date +%Z)"' -DESP_LANG='"$(ESP_LANG)"'
 
 ifdef GLOBAL_CFLAGS
 CFLAGS += $(GLOBAL_CFLAGS)
@@ -211,19 +215,7 @@ all: checkdirs
 	$(Q) make actual_all -j4 -B
 
 release:
-	ESP_LANG=cs make web
-	make actual_all -j4
-	cp firmware/0x00000.bin release/0x00000.bin
-	cp firmware/0x40000.bin release/0x40000-CS.bin
-
-	ESP_LANG=en make web
-	make actual_all -j4
-	cp firmware/0x40000.bin release/0x40000-EN.bin
-
-	ESP_LANG=de make web
-	make actual_all -j4
-	cp firmware/0x40000.bin release/0x40000-DE.bin
-
+	$(Q) ./release.sh
 
 actual_all: parser $(TARGET_OUT) $(FW_BASE)
 

README.md

@@ -5,21 +5,24 @@
 ![Photo][photo-hw]<br>
 *Fig 1: Breadboard adapter developed for ESPTerm*
 
-As of release 1.0, ESPTerm **passes most of VTTEST test cases** (from the main menu and some Xterm specific), making it 
-functionally comparable to eg. gnome-terminal, terminator, konsole, GtkTerm or PuTTY. 
+ESPTerm **passes most of VTTEST test cases**, making it functionally comparable to eg. 
+gnome-terminal, terminator, konsole, GtkTerm or PuTTY. 
 ESPTerm is **capable of running Midnight Commander** through agetty, **including full
-mouse support**, provided agetty is made to believe it's Xterm, which shows ESPTerm is sufficiently well
-implemented to work with ncurses.
+mouse support**, provided agetty is made to believe it's Xterm, which shows ESPTerm 
+is compatible with ncurses.
+
+In addition to control sequences that manipulate the terminal or user input, there 
+is a set of simple **networking commands** for device-to-device message exchange and 
+interacting with remote servers.
 
 To see what escape sequences are supported, check out this [annotated Xterm manual page][xterm-compare]
 which was used for reference, or the built-in help page ([online demo][demo-help])
 
 The terminal screen can be accessed using any web browser, even on a phone or tablet. 
-It works with ESP-01, ESP-01S, ESP-12 and likely many other modules (I use an ESP-12
-on a LoLin NodeMCU board from eBay for development).
+It works with ESP-01, ESP-01S, ESP-12 and likely many other modules.
 
 With ESPTerm, you can add remote access via WiFi to any embeded project, all you need is 
-a serial port and some imagination!
+UART and some imagination!
 
 ## Try it online
 
@@ -48,6 +51,8 @@ It **does not work with**:
 - Internet Explorer (any version) - crashes, missing JS features
 - Opera Mini - crashes, missing JS and CSS features
 - Blackberry browser - not tested, but unlikely
+- Safari on old iOS versions - missing features
+- WebOS browser
 - Old Android Browser (before 4.4?) - not tested, likely missing JS features
 
 ## Main features
@@ -58,6 +63,10 @@ It **does not work with**:
   - Full UTF-8 support, alternate character sets
   - Standard mouse tracking modes
   - You can dynamically set screen title, button labels...
+- **Networking commands**
+  - Command for sending a message to another ESPTerm
+  - API endpoint (`/api/v1/msg`) for receiving messages sent e.g. from a script on PC, web browser or CURL
+  - Command for requesting remote servers and getting back response headers and/or body
 - **Web Terminal Interface**
   - Real-time screen update via WebSocket
   - Mouse and keyboard input, works also on mobile
@@ -67,6 +76,15 @@ It **does not work with**:
 - **User-friendly comprehensive WiFi configuration** (Demo: [WiFi][demo-wifi], [network][demo-network] config)
   - Static IP, DHCP, channel selection, power
   - SSID search utility for finding your existing network
+- **Basic security features**
+  - Possibility to password-lock parts of the web interface
+  - Admin password for some sensitive operations (can be changed!)
+  - Configurable AP password & Hidden attribute
+- **Advanced settings storage**  
+  - Stored in Flash
+  - Seamlesly updated and usually backwards compatible in minor releases
+  - Settings can be saved as defaults and later easily restored (ideal e.g. for classroom use, saving  
+    good tested settings before giving the module to students)
   
 ## Bugs? Ideas?
 
@@ -108,36 +126,31 @@ It can happen that some changes to the WiFi or network config make the module in
 - To reset all settings to defaults, hold the button a couple seconds until the LED flashes rapidly, then release it.
 - You can cancel this wipe/reset operation (when triggered by accident) by pressing Reset or disconnecting the power supply.
 
-### Config files
+### Config banks
 
 ESPTerm has two config "files", one for defaults and one for the currently used settings. In the case of the terminal 
 config, there is also a third, temporary file for changes done via ESC commands.
 
 When you get your settings *just right*, you can store them as defaults, which can then be at any time restored 
 by holding the BOOT (GPIO0) button. You can do this on the System Settings page. This asks for an "admin password", 
-which you can define when building the firmware in the `esphttpdconfig.mk` file. 
-
-The default password is `19738426`. This password can't presently be changed without re-flashing the firmware.
+which can (and should!) be changed. This password can't be easily recovered when forgotten.
 
 You can also restore everything (except the saved defaults) to "factory defaults", there is a button for this 
-on the System Settings page. Those are the initial values in the config files.
+on the System Settings page. Those are the initial values you would get after a clean install.
 
 ## Research resources
 
-Developing ESPTerm wasn't an easy task, because the information is scattered across many places and the existing 
-terminal emulators I originally used for reference (terminator, Konsole) are not implemented correctly in some details.
+Developing the terminal emulator was complicated by the information being scattered across many places and the existing 
+implementations I used for reference often got some details wrong or didn't implement certain features at all. Xterm proved to be by far the most complete implementation.
 
-A great tool for checking my implementation has proven to be [VTTTEST][vttest] and Xterm as a reference
-implementation that is probably the most complete emulator available, although it's cumbersome to use and its age
-really shows in the looks.
+A great tool for checking my code has proven to be [VTTTEST][vttest]. ESPTerm passes most of the tests on the main page and some additional Xterm specific ones, like Mouse Tracking.
 
-I've comnpiled a list of those I found most helpful here: [VT100 emulation resources][resources]
+Here is a list of useful [VT100 emulation resources][resources] I've collected for reference.
 
 ## Development
 
 ESPTerm's firmware is written in C and is based on SpriteTM's `libesphttpd` http server library forked to
-[MightyPork/libesphttpd][httpdlib]. This fork includes various improvements
-and changes required by the project.
+[MightyPork/libesphttpd][httpdlib]. This fork includes various improvements and changes required by the project.
 
 ### Installation for development
 

get_version.c

@@ -0,0 +1,14 @@
+//
+// Created by MightyPork on 2017/10/03.
+//
+// helper for building release packages
+//
+// Run with `tcc -run`
+//
+
+#include "user/version.h"
+#include <stdio.h>
+
+void main() {
+	printf(FW_VERSION);
+}

include/user_config.h

@@ -1 +0,0 @@
-

rel-tpl/README.txt

@@ -0,0 +1,21 @@
+This is a release archive of ESPTerm,
+the VT100 terminal emulator for ESP8266.
+
+--------------------------------------------
+Version: %VERS%
+Locale : %LANG%
+Built  : %DATETIME%
+--------------------------------------------
+
+Source repository:
+  https://github.com/espterm/espterm-firmware
+
+Report any bugs to our bug-tracker at
+  https://github.com/espterm/espterm-firmware/issues
+or send them to out mailing list
+  espterm-dev@googlegroups.com
+
+On-line demo is available at
+  https://espterm.github.io/term.html
+
+[EOF]

rel-tpl/flash.sh

@@ -0,0 +1,26 @@
+#!/usr/bin/env bash
+
+# The parameters ESPTOOL, ESPPORT and ESPBAUD can be customized
+# - export your preferred values in .bashrc
+
+echo -e "\e[32;1mFlashing ESPTerm %VERS% (%LANG%)\e[0m"
+
+if [ -z ${ESPTOOL} ]; then
+	ESPTOOL='esptool'
+	which ${ESPTOOL} &>/dev/null
+	if [ $? -ne 0 ]; then
+		ESPTOOL='esptool.py'
+		which ${ESPTOOL} &>/dev/null
+		if [ $? -ne 0 ]; then
+			echo -e '\e[31;1mesptool not found!\e[0m'
+			exit 1
+		fi
+	fi
+fi
+
+[ -z ESPPORT ] && ESPPORT=/dev/ttyUSB0
+[ -z ESPBAUD ] && ESPBAUD=460800
+
+set -x
+${ESPTOOL} --port ${ESPPORT} --baud ${ESPBAUD} \
+	write_flash 0x00000 '%FILE0%' 0x40000 '%FILE4%'

release/.gitignore

@@ -1,2 +1,3 @@
 *
 !.gitignore
+!flash-tpl.sh

ship.sh

@@ -0,0 +1,69 @@
+#!/usr/bin/env bash
+
+if [ -z "$1" ]; then
+    vers=$(tcc -run get_version.c)
+else
+    vers=$1
+fi
+
+git pull
+
+echo -n -e "\e[1;36mBuilding packages for version $vers\e[0m"
+
+cd front-end
+git pull
+cd ..
+
+function buildlang() {
+    lang=$1
+
+    echo -e "\n\e[33;1m------ Building \"${lang}\" package ------\e[0m\n"
+
+    make clean
+    ESP_LANG=${lang} make web
+    ESP_LANG=${lang} make actual_all -B -j4
+
+    cd release
+
+    destdir="$vers-$lang"
+    file0=${vers}-0x00000-${lang}.bin
+    file4=${vers}-0x40000-${lang}.bin
+    [ -e ${destdir} ] && rm -r ${destdir}
+    mkdir ${destdir}
+    cp ../firmware/0x00000.bin ${destdir}/${file0}
+    cp ../firmware/0x40000.bin ${destdir}/${file4}
+
+    flashsh=${destdir}/flash.sh
+    cp ../rel-tpl/flash.sh ${flashsh}
+    sed -i s/%FILE0%/${file0}/ ${flashsh}
+    sed -i s/%FILE4%/${file4}/ ${flashsh}
+    sed -i s/%VERS%/${vers}/ ${flashsh}
+    sed -i s/%LANG%/${lang}/ ${flashsh}
+    chmod +x ${flashsh}
+
+    readmefil=${destdir}/README.txt
+    cp ../rel-tpl/README.txt ${readmefil}
+    sed -i s/%VERS%/${vers}/ ${readmefil}
+    sed -i s/%LANG%/${lang}/ ${readmefil}
+    dt=$(LC_TIME=en_US.UTF-8 date '+%c')
+    sed -i "s#%DATETIME%#${dt}#" ${readmefil}
+    unix2dos ${readmefil}
+
+    cd ${destdir}
+    sha256sum ${file0} ${file4} README.txt flash.sh > checksums.txt
+    cd ..
+
+    targetfile=espterm-${vers}-${lang}.zip
+    [[ -e ${targetfile}.zip ]] && rm ${targetfile}.zip
+    pwd
+    zip -9 ${targetfile} ${destdir}/*
+    cd ..
+}
+
+if [ -z "$ESP_LANG" ]; then
+    buildlang cs
+    buildlang en
+    buildlang de
+else
+    buildlang ${ESP_LANG}
+fi

user/ansi_parser_callbacks.c

@@ -11,7 +11,7 @@
 #include "version.h"
 #include "uart_buffer.h"
 #include "screen.h"
-#include "uart_driver.h"
+#include "wifimgr.h"
 
 volatile bool enquiry_suppressed = false;
 ETSTimer enqTimer;
@@ -27,8 +27,8 @@ void ICACHE_FLASH_ATTR enqTimerCb(void *unused)
 void ICACHE_FLASH_ATTR
 apars_respond(const char *str)
 {
-	UART_WriteString(UART0, str, UART_TIMEOUT_US);
-	//UART_SendAsync(str, -1);
+	// Using the Tx buffer causes issues with large data (eg. from http requests)
+	UART_SendAsync(str, -1);
 }
 
 /**
@@ -48,8 +48,24 @@ apars_handle_enq(void)
 {
 	if (enquiry_suppressed) return;
 
+	u8 mac[6];
+	wifi_get_macaddr(SOFTAP_IF, mac);
+
+	char buf100[100];
+	char *buf = buf100;
+	buf += sprintf(buf, "\x1bX");
+	buf += sprintf(buf, "ESPTerm "VERSION_STRING" ");
+	buf += sprintf(buf, "#"GIT_HASH_BACKEND"+"GIT_HASH_FRONTEND" ");
+	buf += sprintf(buf, "id=%02X%02X%02X ", mac[3], mac[4], mac[5]);
+	int x = getStaIpAsString(buf);
+	if (x) buf += x;
+	else buf--; // remove the trailing space
+	buf += sprintf(buf, "\x1b\\");
+
+	(void)buf;
+
 	// version encased in SOS and ST
-	apars_respond("\x1bXESPTerm " FIRMWARE_VERSION "\x1b\\");
+	apars_respond(buf100);
 
 	// Throttle enquiry - this is a single-character-invoked response,
 	// so it tends to happen randomly when throwing garbage at the ESP.

user/apars_osc.c

@@ -49,6 +49,10 @@ apars_handle_osc(char *buffer)
 			buffer[0] = 'G';
 			notify_growl(buffer);
 		}
+		else if (n == 70) {
+			// ESPTerm: backdrop
+			screen_set_backdrop(buffer);
+		}
 		else if (n >= 81 && n <= 85) {
 			// ESPTerm: action button label
 			screen_set_button_text(n - 80, buffer);

user/cgi_d2d.c

@@ -7,13 +7,14 @@
 #include "version.h"
 #include "ansi_parser_callbacks.h"
 #include "api.h"
+#include "uart_driver.h"
 #include <httpclient.h>
 #include <esp_utils.h>
 
 #define D2D_TIMEOUT_MS 2000
 
 #define D2D_HEADERS \
-	"User-Agent: ESPTerm "FIRMWARE_VERSION" like curl wget HTTPie\r\n" \
+	"User-Agent: ESPTerm "VERSION_STRING" like curl wget HTTPie\r\n" \
 	"Content-Type: text/plain; charset=utf-8\r\n" \
 	"Accept-Encoding: identity\r\n" \
 	"Accept-Charset: utf-8\r\n" \
@@ -29,6 +30,14 @@ struct d2d_request_opts {
 
 volatile bool request_pending = false;
 
+// NOTE! We bypass the async buffer here - used for user input and
+// responses to queries {apars_respond()}. In rare situations this could
+// lead to a race condition and mixing two different messages
+static inline void ICACHE_FLASH_ATTR sendResponseToUART(const char *str)
+{
+	UART_WriteString(UART0, str, UART_TIMEOUT_US);
+}
+
 static void ICACHE_FLASH_ATTR
 requestNoopCb(int http_status,
 			   char *response_headers,
@@ -54,8 +63,6 @@ requestCb(int http_status,
 
 	struct d2d_request_opts *opts = userArg;
 
-	d2d_dbg("Rx url response, code %d, nonce \"%s\"", http_status, opts->nonce?opts->nonce:"");
-
 	// ensure positive - would be hard to parse
 	if (http_status < 0) http_status = -http_status;
 
@@ -68,6 +75,8 @@ requestCb(int http_status,
 	if (opts->max_result_len > 0 && len > opts->max_result_len)
 		len = (int) opts->max_result_len;
 
+	d2d_info("Rx HTTP response, code %d, len %d, nonce \"%s\"", http_status, len, opts->nonce?opts->nonce:"");
+
 	char *bb = buff100;
 	bb += sprintf(bb, "\x1b^h;%d;", http_status);
 	const char *comma = "";
@@ -95,7 +104,7 @@ requestCb(int http_status,
 	// semicolon only if more data is to be sent
 	if (opts->want_head || opts->want_body)	sprintf(bb, ";");
 
-	apars_respond(buff100);
+	sendResponseToUART(buff100);
 
 	//d2d_dbg("Headers (part) %100s", response_headers);
 	//d2d_dbg("Body (part) %100s", response_body);
@@ -107,8 +116,8 @@ requestCb(int http_status,
 			response_headers[len] = 0;
 			opts->want_body = false; // soz, it wouldn't fit
 		}
-		apars_respond(response_headers);
-		if(opts->want_body) apars_respond("\r\n");
+		sendResponseToUART(response_headers);
+		if(opts->want_body) sendResponseToUART("\r\n");
 	}
 
 	if(opts->want_body) {
@@ -117,10 +126,10 @@ requestCb(int http_status,
 			response_body[len - (opts->want_head*(headers_size+2))] = 0;
 		}
 
-		apars_respond(response_body);
+		sendResponseToUART(response_body);
 	}
 
-	apars_respond("\a");
+	sendResponseToUART("\a");
 
 	free(opts->nonce);
 	free(opts);
@@ -151,7 +160,7 @@ d2d_parse_command(char *msg)
 		FIND_NEXT(ip, ';');
 		const char *payload = msg;
 
-		d2d_dbg("D2D Tx,dest=%s,msg=%s", ip, payload);
+		d2d_info("D2D Tx,dest=%s,msg=%s", ip, payload);
 		sprintf(buff40, "http://%s" API_D2D_MSG, ip);
 
 		httpclient_args args;
@@ -194,9 +203,8 @@ d2d_parse_command(char *msg)
 
 		FIND_NEXT(params, ';');
 
+		d2d_info("HTTP request");
 		d2d_dbg("Method %s", method);
-		d2d_dbg("Params %s", params);
-
 		size_t max_buf_len = HTTPCLIENT_DEF_MAX_LEN;
 		size_t max_result_len = 0; // 0 = no truncate
 		uint timeout = HTTPCLIENT_DEF_TIMEOUT_MS;
@@ -265,7 +273,7 @@ d2d_parse_command(char *msg)
 		request_pending = true;
 		http_request(&args, no_resp ? requestNoopCb : requestCb);
 
-		d2d_dbg("Done");
+		d2d_dbg("Request sent.");
 		return true;
 	}
 
@@ -290,16 +298,16 @@ httpd_cgi_state ICACHE_FLASH_ATTR cgiD2DMessage(HttpdConnData *connData)
 	u8 *ip = connData->remote_ip;
 	char buf[20];
 	sprintf(buf, "\x1b^m;"IPSTR";L=%d;", ip[0], ip[1], ip[2], ip[3], (int)len);
-	apars_respond(buf);
+	sendResponseToUART(buf);
 
 	if (connData->post && connData->post->buff)
-		apars_respond(connData->post->buff);
+		sendResponseToUART(connData->post->buff);
 	else if (connData->getArgs)
-		apars_respond(connData->getArgs);
+		sendResponseToUART(connData->getArgs);
 
-	apars_respond("\a");
+	sendResponseToUART("\a");
 
-	d2d_dbg("D2D Rx src="IPSTR",len=%d", ip[0], ip[1], ip[2], ip[3],len);
+	d2d_info("D2D Rx src="IPSTR",len=%d", ip[0], ip[1], ip[2], ip[3],len);
 
 	// Received a msg
 

user/cgi_main.c

@@ -44,7 +44,7 @@ tplAbout(HttpdConnData *connData, char *token, void **arg)
 	if (token == NULL) return HTTPD_CGI_DONE;
 
 	if (streq(token, "vers_fw")) {
-		tplSend(connData, FIRMWARE_VERSION, -1);
+		tplSend(connData, VERSION_STRING, -1);
 	}
 	else if (streq(token, "date")) {
 		tplSend(connData, __DATE__, -1);

user/cgi_term_cfg.c

@@ -256,10 +256,16 @@ cgiTermCfgSetParams(HttpdConnData *connData)
 
 	if (GET_ARG("term_title")) {
 		cgi_dbg("Terminal title default text: \"%s\"", buff);
-		strncpy_safe(termconf->title, buff, 64); // ATTN those must match the values in
+		strncpy_safe(termconf->title, buff, TERM_TITLE_LEN); // ATTN those must match the values in
 		topics |= TOPIC_CHANGE_TITLE;
 	}
 
+	if (GET_ARG("backdrop")) {
+		cgi_dbg("Terminal backdrop url: \"%s\"", buff);
+		strncpy_safe(termconf->backdrop, buff, TERM_BACKDROP_LEN); // ATTN those must match the values in
+		topics |= TOPIC_CHANGE_BACKDROP;
+	}
+
 	for (int btn_i = 1; btn_i <= TERM_BTN_COUNT; btn_i++) {
 		sprintf(buff, "btn%d", btn_i);
 		if (GET_ARG(buff)) {
@@ -416,7 +422,7 @@ cgiTermCfgSetParams(HttpdConnData *connData)
 httpd_cgi_state ICACHE_FLASH_ATTR
 tplTermCfg(HttpdConnData *connData, char *token, void **arg)
 {
-#define BUFLEN TERM_TITLE_LEN
+#define BUFLEN 100 // large enough for backdrop
 	char buff[BUFLEN];
 	char buff2[10];
 
@@ -492,6 +498,9 @@ tplTermCfg(HttpdConnData *connData, char *token, void **arg)
 	else if (streq(token, "term_title")) {
 		strncpy_safe(buff, termconf->title, BUFLEN);
 	}
+	else if (streq(token, "backdrop")) {
+		strncpy_safe(buff, termconf->backdrop, BUFLEN);
+	}
 	else if (streq(token, "uart_baud")) {
 		sprintf(buff, "%d", sysconf->uart_baudrate);
 	}

user/cgi_wifi.c

@@ -617,22 +617,7 @@ httpd_cgi_state ICACHE_FLASH_ATTR tplWlan(HttpdConnData *connData, char *token,
 		}
 	}
 	else if (streq(token, "sta_active_ip")) {
-		x = wifi_get_opmode();
-		connectStatus = wifi_station_get_connect_status();
-
-		if (x == SOFTAP_MODE || connectStatus != STATION_GOT_IP || wificonf->opmode == SOFTAP_MODE) {
-			strcpy(buff, "");
-		}
-		else {
-			struct ip_info info;
-			wifi_get_ip_info(STATION_IF, &info);
-			sprintf(buff, IPSTR, GOOD_IP2STR(info.ip.addr));
-
-//			sprintf(buff, "ip: "IPSTR", mask: "IPSTR", gw: "IPSTR,
-//					GOOD_IP2STR(info.ip.addr),
-//					GOOD_IP2STR(info.netmask.addr),
-//					GOOD_IP2STR(info.gw.addr));
-		}
+		getStaIpAsString(buff);
 	}
 
 	tplSend(connData, buff, -1);

user/character_sets.h

@@ -19,143 +19,352 @@
  * Based on rxvt-unicode screen.C table.
  */
 static const u16 codepage_0[] ESP_CONST_DATA =
-	{//	Unicode    ASCII   SYM
+	{   //         Unicode  ASCII   SYM
 		// %%BEGIN:0%%
-		0x2666, // 96	`	♦
-		0x2592, // 97	a	▒
-		0x2409, // 98	b	HT
-		0x240c, // 99	c	FF
-		0x240d, // 100	d	CR
-		0x240a, // 101	e	LF
-		0x00b0, // 102	f	°
-		0x00b1, // 103	g	±
-		0x2424, // 104	h	NL
-		0x240b, // 105	i	VT
-		0x2518, // 106	j	┘
-		0x2510, // 107	k	┐
-		0x250c, // 108	l	┌
-		0x2514, // 109	m	└
-		0x253c, // 110	n	┼
-		0x23ba, // 111	o	⎺
-		0x23bb, // 112	p	⎻
-		0x2500, // 113	q	─
-		0x23bc, // 114	r	⎼
-		0x23bd, // 115	s	⎽
-		0x251c, // 116	t	├
-		0x2524, // 117	u	┤
-		0x2534, // 118	v	┴
-		0x252c, // 119	w	┬
-		0x2502, // 120	x	│
-		0x2264, // 121	y	≤
-		0x2265, // 122	z	≥
-		0x03c0, // 123	{	π
-		0x2260, // 124	|	≠
-		0x20a4, // 125	}	£
-		0x00b7, // 126	~	·
+		u'♦',	// 0x2666	96	`
+		u'▒',	// 0x2592	97	a
+		u'␉',	// 0x2409	98	b
+		u'␌',	// 0x240c	99	c	FF
+		u'␍',	// 0x240d	100	d	CR
+		u'␊',	// 0x240a	101	e	LF
+		u'°',	// 0x00b0	102	f
+		u'±',	// 0x00b1	103	g
+		u'␤',	// 0x2424	104	h	NL
+		u'␋',	// 0x240b	105	i	VT
+		u'┘',	// 0x2518	106	j
+		u'┐',	// 0x2510	107	k
+		u'┌',	// 0x250c	108	l
+		u'└',	// 0x2514	109	m
+		u'┼',	// 0x253c	110	n
+		u'⎺',	// 0x23ba	111	o
+		u'⎻',	// 0x23bb	112	p
+		u'─',	// 0x2500	113	q
+		u'⎼',	// 0x23bc	114	r
+		u'⎽',	// 0x23bd	115	s
+		u'├',	// 0x251c	116	t
+		u'┤',	// 0x2524	117	u
+		u'┴',	// 0x2534	118	v
+		u'┬',	// 0x252c	119	w
+		u'│',	// 0x2502	120	x
+		u'≤',	// 0x2264	121	y
+		u'≥',	// 0x2265	122	z
+		u'π',	// 0x03c0	123	{
+		u'≠',	// 0x2260	124	|
+		u'£',	// 0x20a4	125	}
+		u'·',	// 0x00b7	126	~
 		// %%END:0%%
 	};
 
 #define CODEPAGE_1_BEGIN 33
 #define CODEPAGE_1_END 126
 
+// DOS, thin and double lines, arrows, angles, diagonals, thick border
 static const u16 codepage_1[] ESP_CONST_DATA =
-	{//	Unicode    ASCII   SYM  DOS
+	{//            Unicode  ASCII  DOS
 		// %%BEGIN:1%%
-		0x263A,	// 33	!	☺	(1)  - low ASCII symbols from DOS, moved to +32
-		0x263B,	// 34	"	☻	(2)
-		0x2665,	// 35	#	♥	(3)
-		0x2666,	// 36	$	♦	(4)
-		0x2663,	// 37	%	♣	(5)
-		0x2660,	// 38	&	♠	(6)
-		0x2022,	// 39	'	•	(7)  - inverse dot and circle left out, can be done with SGR
-		0x231B,	// 40	(	⌛        - hourglass (timer icon)
-		0x25CB,	// 41	)	○	(9)
-		0x21AF,	// 42	*	↯        - electricity (lightning monitor...)
-		0x266A,	// 43	+	♪	(13)
-		0x266B,	// 44	,	♫	(14)
-		0x263C,	// 45	-	☼	(15)
-		0x2302,	// 46	.	⌂	(127)
-		0x2622,	// 47	/	☢         - radioactivity (geiger counter...)
-		0x2591,	// 48	0	░	(176) - this block is kept aligned and ordered from DOS, moved -128
-		0x2592,	// 49	1	▒	(177)
-		0x2593,	// 50	2	▓	(178)
-		0x2502,	// 51	3	│	(179)
-		0x2524,	// 52	4	┤	(180)
-		0x2561,	// 53	5	╡	(181)
-		0x2562,	// 54	6	╢	(182)
-		0x2556,	// 55	7	╖	(183)
-		0x2555,	// 56	8	╕	(184)
-		0x2563,	// 57	9	╣	(185)
-		0x2551,	// 58	:	║	(186)
-		0x2557,	// 59	;	╗	(187)
-		0x255D,	// 60	<	╝	(188)
-		0x255C,	// 61	=	╜	(189)
-		0x255B,	// 62	>	╛	(190)
-		0x2510,	// 63	?	┐	(191)
-		0x2514,	// 64	@	└	(192)
-		0x2534,	// 65	A	┴	(193)
-		0x252C,	// 66	B	┬	(194)
-		0x251C,	// 67	C	├	(195)
-		0x2500,	// 68	D	─	(196)
-		0x253C,	// 69	E	┼	(197)
-		0x255E,	// 70	F	╞	(198)
-		0x255F,	// 71	G	╟	(199)
-		0x255A,	// 72	H	╚	(200)
-		0x2554,	// 73	I	╔	(201)
-		0x2569,	// 74	J	╩	(202)
-		0x2566,	// 75	K	╦	(203)
-		0x2560,	// 76	L	╠	(204)
-		0x2550,	// 77	M	═	(205)
-		0x256C,	// 78	N	╬	(206)
-		0x2567,	// 79	O	╧	(207)
-		0x2568,	// 80	P	╨	(208)
-		0x2564,	// 81	Q	╤	(209)
-		0x2565,	// 82	R	╥	(210)
-		0x2559,	// 83	S	╙	(211)
-		0x2558,	// 84	T	╘	(212)
-		0x2552,	// 85	U	╒	(213)
-		0x2553,	// 86	V	╓	(214)
-		0x256B,	// 87	W	╫	(215)
-		0x256A,	// 88	X	╪	(216)
-		0x2518,	// 89	Y	┘	(217)
-		0x250C,	// 90	Z	┌	(218)
-		0x2588,	// 91	[	█	(219)
-		0x2584,	// 92	\	▄	(220)
-		0x258C,	// 93	]	▌	(221)
-		0x2590,	// 94	^	▐	(222)
-		0x2580,	// 95	_	▀	(223)
-		0x2195,	// 96	`	↕	(18)  - moved from low DOS ASCII
-		0x2191,	// 97	a	↑	(24)
-		0x2193,	// 98	b	↓	(25)
-		0x2192,	// 99	c	→	(26)
-		0x2190,	// 100	d	←	(27)
-		0x2194,	// 101	e	↔	(29)
-		0x25B2,	// 102	f	▲	(30)
-		0x25BC,	// 103	g	▼	(31)
-		0x25BA,	// 104	h	►	(16)
-		0x25C4,	// 105	i	◄	(17)
-		0x25E2,	// 106	j	◢         - added for slanted corners
-		0x25E3,	// 107	k	◣
-		0x25E4,	// 108	l	◤
-		0x25E5,	// 109	m	◥
-		0x256D,	// 110	n	╭         - rounded corners
-		0x256E,	// 111	o	╮
-		0x256F,	// 112	p	╯
-		0x2570,	// 113	q	╰
-		0x0,	// 114	r             - free positions for future expansion
-		0x0,	// 115	s
-		0x0,	// 116	t
-		0x0,	// 117	u
-		0x0,	// 118	v
-		0x0,	// 119	w
-		0x0,	// 120	x
-		0x0,	// 121	y
-		0x0,	// 122	z
-		0x0,	// 123	{
-		0x0,	// 124	|
-		0x2714,	// 125	}	✔         - checkboxes or checklist items
-		0x2718,	// 126	~	✘
+		u'☺',	// 0x263A,	33	!	(1)  - low ASCII symbols from DOS, moved to +32
+		u'☻',	// 0x263B,	34	"	(2)
+		u'♥',	// 0x2665,	35	#	(3)
+		u'♦',	// 0x2666,	36	$	(4)
+		u'♣',	// 0x2663,	37	%	(5)
+		u'♠',	// 0x2660,	38	&	(6)
+		u'•',	// 0x2022,	39	'	(7)  - inverse dot and circle left out, can be done with SGR
+		u'⌛',	// 0x231B,	40	(	- hourglass (timer icon)
+		u'○',	// 0x25CB,	41	)	(9)
+		u'↯',	// 0x21AF,	42	*	- electricity (lightning monitor...)
+		u'♪',	// 0x266A,	43	+	(13)
+		u'♫',	// 0x266B,	44	,	(14)
+		u'☼',	// 0x263C,	45	-	(15)
+		u'⌂',	// 0x2302,	46	.	(127)
+		u'☢',	// 0x2622,	47	/	- radioactivity (geiger counter...)
+		u'░',	// 0x2591,	48	0	(176) - this block is kept aligned and ordered from DOS, moved -128
+		u'▒',	// 0x2592,	49	1	(177)
+		u'▓',	// 0x2593,	50	2	(178)
+		u'│',	// 0x2502,	51	3	(179)
+		u'┤',	// 0x2524,	52	4	(180)
+		u'╡',	// 0x2561,	53	5	(181)
+		u'╢',	// 0x2562,	54	6	(182)
+		u'╖',	// 0x2556,	55	7	(183)
+		u'╕',	// 0x2555,	56	8	(184)
+		u'╣',	// 0x2563,	57	9	(185)
+		u'║',	// 0x2551,	58	:	(186)
+		u'╗',	// 0x2557,	59	;	(187)
+		u'╝',	// 0x255D,	60	<	(188)
+		u'╜',	// 0x255C,	61	=	(189)
+		u'╛',	// 0x255B,	62	>	(190)
+		u'┐',	// 0x2510,	63	?	(191)
+		u'└',	// 0x2514,	64	@	(192)
+		u'┴',	// 0x2534,	65	A	(193)
+		u'┬',	// 0x252C,	66	B	(194)
+		u'├',	// 0x251C,	67	C	(195)
+		u'─',	// 0x2500,	68	D	(196)
+		u'┼',	// 0x253C,	69	E	(197)
+		u'╞',	// 0x255E,	70	F	(198)
+		u'╟',	// 0x255F,	71	G	(199)
+		u'╚',	// 0x255A,	72	H	(200)
+		u'╔',	// 0x2554,	73	I	(201)
+		u'╩',	// 0x2569,	74	J	(202)
+		u'╦',	// 0x2566,	75	K	(203)
+		u'╠',	// 0x2560,	76	L	(204)
+		u'═',	// 0x2550,	77	M	(205)
+		u'╬',	// 0x256C,	78	N	(206)
+		u'╧',	// 0x2567,	79	O	(207)
+		u'╨',	// 0x2568,	80	P	(208)
+		u'╤',	// 0x2564,	81	Q	(209)
+		u'╥',	// 0x2565,	82	R	(210)
+		u'╙',	// 0x2559,	83	S	(211)
+		u'╘',	// 0x2558,	84	T	(212)
+		u'╒',	// 0x2552,	85	U	(213)
+		u'╓',	// 0x2553,	86	V	(214)
+		u'╫',	// 0x256B,	87	W	(215)
+		u'╪',	// 0x256A,	88	X	(216)
+		u'┘',	// 0x2518,	89	Y	(217)
+		u'┌',	// 0x250C,	90	Z	(218)
+		u'█',	// 0x2588,	91	[	(219)
+		u'▄',	// 0x2584,	92	\	(220)
+		u'▌',	// 0x258C,	93	]	(221)
+		u'▐',	// 0x2590,	94	^	(222)
+		u'▀',	// 0x2580,	95	_	(223)
+		u'↕',	// 0x2195,	96	`	(18)  - moved from low DOS ASCII
+		u'↑',	// 0x2191,	97	a	(24)
+		u'↓',	// 0x2193,	98	b	(25)
+		u'→',	// 0x2192,	99	c	(26)
+		u'←',	// 0x2190,	100	d	(27)
+		u'↔',	// 0x2194,	101	e	(29)
+		u'▲',	// 0x25B2,	102	f	(30)
+		u'▼',	// 0x25BC,	103	g	(31)
+		u'►',	// 0x25BA,	104	h	(16)
+		u'◄',	// 0x25C4,	105	i	(17)
+		u'◢',	// 0x25E2,	106	j	- added for slanted corners
+		u'◣',	// 0x25E3,	107	k
+		u'◤',	// 0x25E4,	108	l
+		u'◥',	// 0x25E5,	109	m
+		u'╭',	// 0x256D,	110	n	- rounded corners
+		u'╮',	// 0x256E,	111	o
+		u'╯',	// 0x256F,	112	p
+		u'╰',	// 0x2570,	113	q
+		u'╱',	// 0x0,	114	r - right up diagonal
+		u'╲',	// 0x0,	115	s - right down diagonal
+		u'╳',	// 0x0,	116	t
+		u'↺',	// 0x0,	117	u
+		u'↻',	// 0x0,	118	v
+		u'¶',	// 0x0,	119	w
+		u'⏻',	// 0x0,	120	x
+		0xE0B0,	// powerline right triangle (filled), 121 y
+		0xE0B1,	// powerline right triangle (hollow), 122	z
+		0xE0B2,	// powerline left triangle (filled), 123	{
+		0xE0B3,	// powerline left triangle (hollow), 124	|	- reserved
+		u'✔',	// 0x2714,	125	}	- checkboxes or checklist items
+		u'✘',	// 0x2718,	126	~
 		// %%END:1%%
 	};
 
+#define CODEPAGE_2_BEGIN 33
+#define CODEPAGE_2_END 126
+
+// blocks, thick and split lines, line butts
+static const u16 codepage_2[] ESP_CONST_DATA =
+	{//            Unicode  ASCII  DOS
+		// %%BEGIN:2%%
+		u'▁',	// 0x2581,	33	! - those are ordered this way to allow easy calculating of the right code (for graphs)
+		u'▂',	// 0x2582,	34	"
+		u'▃',	// 0x2583,	35	#
+		u'▄',	// 0x2584,	36	$
+		u'▅',	// 0x2585,	37	%
+		u'▆',	// 0x2586,	38	&
+		u'▇',	// 0x2587,	39	' - 7-eighths
+		u'█',	// 0x2588,	40	( - full block, shared by both sequences
+		u'▉',	// 0x2589,	41	) - those grow thinner, to re-use the full block
+		u'▊',	// 0x258A,	42	*
+		u'▋',	// 0x258B,	43	+
+		u'▌',	// 0x258C,	44	,
+		u'▍',	// 0x258D,	45	-
+		u'▎',	// 0x258E,	46	.
+		u'▏',	// 0x258F,	47	/
+		u'▔',	// 0x2594,	48	0 - complementary symbols
+		u'▕',	// 0x2595,	49	1
+		u'▐',	// 0x2590,	50	2
+		u'▀',	// 0x2580,	51	3
+		u'▘',	// 0x2598,	52	4 - top-left, top-right, bottom-right, bottom-left
+		u'▝',	// 0x259D,	53	5
+		u'▗',	// 0x2597,	54	6
+		u'▖',	// 0x2596,	55	7
+		u'▟',	// 0x259F,	56	8
+		u'▙',	// 0x2599,	57	9
+		u'▛',	// 0x259B,	58	:
+		u'▜',	// 0x259C,	59	;
+		u'▞',	// 0x259E,	60	< - complementary diagonals
+		u'▚',	// 0x259A,	61	=
+		u'━',	// 0x,	62	> - here are thick and thin lines and their joins. it's really quite arbitrary, based on the unicode order, excluding single lines
+		u'┃',	// 0x,	63	?
+		u'┍',	// 0x,	64	@
+		u'┎',	// 0x,	65	A
+		u'┏',	// 0x,	66	B
+		u'┑',	// 0x,	67	C
+		u'┒',	// 0x,	68	D
+		u'┓',	// 0x,	69	E
+		u'┕',	// 0x,	70	F
+		u'┖',	// 0x,	71	G
+		u'┗',	// 0x,	72	H
+		u'┙',	// 0x,	73	I
+		u'┚',	// 0x,	74	J
+		u'┛',	// 0x,	75	K
+		u'┝',	// 0x,	76	L
+		u'┞',	// 0x,	77	M
+		u'┟',	// 0x,	78	N
+		u'┠',	// 0x,	79	O
+		u'┡',	// 0x,	80	P
+		u'┢',	// 0x,	81	Q
+		u'┣',	// 0x,	82	R
+		u'┥',	// 0x,	83	S
+		u'┦',	// 0x,	84	T
+		u'┧',	// 0x,	85	U
+		u'┨',	// 0x,	86	V
+		u'┩',	// 0x,	87	W
+		u'┪',	// 0x,	88	X
+		u'┫',	// 0x,	89	Y
+		u'┭',	// 0x,	90	Z
+		u'┮',	// 0x,	91	[
+		u'┯',	// 0x,	92	\ .
+		u'┰',	// 0x,	93	]
+		u'┱',	// 0x,	94	^
+		u'┲',	// 0x,	95	_
+		u'┳',	// 0x,	96	`
+		u'┵',	// 0x,	97	a
+		u'┶',	// 0x,	98	b
+		u'┷',	// 0x,	99	c
+		u'┸',	// 0x,	100	d
+		u'┹',	// 0x,	101	e
+		u'┺',	// 0x,	102	f
+		u'┻',	// 0x,	103	g
+		u'┽',	// 0x,	104	h
+		u'┾',	// 0x,	105	i
+		u'┿',	// 0x,	106	j
+		u'╀',	// 0x,	107	k
+		u'╁',	// 0x,	108	l
+		u'╂',	// 0x,	109	m
+		u'╃',	// 0x,	110	n
+		u'╄',	// 0x,	111	o
+		u'╅',	// 0x,	112	p
+		u'╆',	// 0x,	113	q
+		u'╇',	// 0x,	114	r
+		u'╈',	// 0x,	115	s
+		u'╉',	// 0x,	116	t
+		u'╊',	// 0x,	117	u
+		u'╋',	// 0x,	118	v
+		u'╴',	// 0x,	119	w - butts
+		u'╵',	// 0x,	120	x
+		u'╶',	// 0x,	121	y
+		u'╷',	// 0x,	122	z
+		u'╸',	// 0x,	123	{
+		u'╹',	// 0x,  124	|
+		u'╺',	// 0x,	125	}
+		u'╻',	// 0x,	126	~
+		// %%END:2%%
+	};
+
+#define CODEPAGE_3_BEGIN 33
+#define CODEPAGE_3_END 48
+
+// dashed lines, split straight lines
+static const u16 codepage_3[] ESP_CONST_DATA =
+	{//            Unicode  ASCII  DOS
+		// %%BEGIN:3%%
+		u'╌',	// 0x,	33	!
+		u'┄',	// 0x,	34	"
+		u'┈',	// 0x,	35	#
+		u'╍',	// 0x,	36	$
+		u'┅',	// 0x,	37	%
+		u'┉',	// 0x,	38	&
+		u'╎',	// 0x,	39	'
+		u'┆',	// 0x,	40	(
+		u'┊',	// 0x,	41	)
+		u'╏',	// 0x,	42	*
+		u'┇',	// 0x,	43	+
+		u'┋',	// 0x,	44	,
+		u'╼',	// 0x,	45	-
+		u'╽',	// 0x,	46	.
+		u'╾',	// 0x,	47	/
+		u'╿',	// 0x,	48	0
+		// %%END:3%%
+//		u'\0',	// 0x,	49	1
+//		u'\0',	// 0x,	50	2
+//		u'\0',	// 0x,	51	3
+//		u'\0',	// 0x,	52	4
+//		u'\0',	// 0x,	53	5
+//		u'\0',	// 0x,	54	6
+//		u'\0',	// 0x,	55	7
+//		u'\0',	// 0x,	56	8
+//		u'\0',	// 0x,	57	9
+//		u'\0',	// 0x,	58	:
+//		u'\0',	// 0x,	59	;
+//		u'\0',	// 0x,	60	<
+//		u'\0',	// 0x,	61	=
+//		u'\0',	// 0x,	62	>
+//		u'\0',	// 0x,	63	?
+//		u'\0',	// 0x,	64	@
+//		u'\0',	// 0x,	65	A
+//		u'\0',	// 0x,	66	B
+//		u'\0',	// 0x,	67	C
+//		u'\0',	// 0x,	68	D
+//		u'\0',	// 0x,	69	E
+//		u'\0',	// 0x,	70	F
+//		u'\0',	// 0x,	71	G
+//		u'\0',	// 0x,	72	H
+//		u'\0',	// 0x,	73	I
+//		u'\0',	// 0x,	74	J
+//		u'\0',	// 0x,	75	K
+//		u'\0',	// 0x,	76	L
+//		u'\0',	// 0x,	77	M
+//		u'\0',	// 0x,	78	N
+//		u'\0',	// 0x,	79	O
+//		u'\0',	// 0x,	80	P
+//		u'\0',	// 0x,	81	Q
+//		u'\0',	// 0x,	82	R
+//		u'\0',	// 0x,	83	S
+//		u'\0',	// 0x,	84	T
+//		u'\0',	// 0x,	85	U
+//		u'\0',	// 0x,	86	V
+//		u'\0',	// 0x,	87	W
+//		u'\0',	// 0x,	88	X
+//		u'\0',	// 0x,	89	Y
+//		u'\0',	// 0x,	90	Z
+//		u'\0',	// 0x,	91	[
+//		u'\0',	// 0x,	92	\ .
+//		u'\0',	// 0x,	93	]
+//		u'\0',	// 0x,	94	^
+//		u'\0',	// 0x,	95	_
+//		u'\0',	// 0x,	96	`
+//		u'\0',	// 0x,	97	a
+//		u'\0',	// 0x,	98	b
+//		u'\0',	// 0x,	99	c
+//		u'\0',	// 0x,	100	d
+//		u'\0',	// 0x,	101	e
+//		u'\0',	// 0x,	102	f
+//		u'\0',	// 0x,	103	g
+//		u'\0',	// 0x,	104	h
+//		u'\0',	// 0x,	105	i
+//		u'\0',	// 0x,	106	j
+//		u'\0',	// 0x,	107	k
+//		u'\0',	// 0x,	108	l
+//		u'\0',	// 0x,	109	m
+//		u'\0',	// 0x,	110	n
+//		u'\0',	// 0x,	111	o
+//		u'\0',	// 0x,	112	p
+//		u'\0',	// 0x,	113	q
+//		u'\0',	// 0x,	114	r
+//		u'\0',	// 0x,	115	s
+//		u'\0',	// 0x,	116	t
+//		u'\0',	// 0x,	117	u
+//		u'\0',	// 0x,	118	v
+//		u'\0',	// 0x,	119	w
+//		u'\0',	// 0x,	120	x
+//		u'\0',	// 0x,	121	y
+//		u'\0',	// 0x,	122	z
+//		u'\0',	// 0x,	123	{
+//		u'\0',	// 0x,  124	|
+//		u'\0',	// 0x,	125	}
+//		u'\0',	// 0x,	126	~
+	};
+
 #endif //ESPTERM_CHARACTER_SETS_H_H

user/screen.c

@@ -213,6 +213,7 @@ terminal_restore_defaults(void)
 	termconf->debugbar = SCR_DEF_DEBUGBAR;
 	termconf->allow_decopt_12 = SCR_DEF_DECOPT12;
 	termconf->ascii_debug = SCR_DEF_ASCIIDEBUG;
+	termconf->backdrop[0] = 0;
 }
 
 /**
@@ -247,6 +248,11 @@ terminal_apply_settings_noclear(void)
 		termconf->ascii_debug = SCR_DEF_ASCIIDEBUG;
 		changed = 1;
 	}
+	if (termconf->config_version < 4) {
+		persist_dbg("termconf: Updating to version %d", 1);
+		termconf->backdrop[0] = 0;
+		changed = 1;
+	}
 
 	termconf->config_version = TERMCONF_VERSION;
 
@@ -385,6 +391,7 @@ screen_reset_do(bool size, bool labels)
 
 	if (labels) {
 		strcpy(termconf_live.title, termconf->title);
+		strcpy(termconf_live.backdrop, termconf->backdrop);
 
 		for (int i = 1; i <= TERM_BTN_COUNT; i++) {
 			strcpy(termconf_live.btn[i], termconf->btn[i]);
@@ -394,7 +401,7 @@ screen_reset_do(bool size, bool labels)
 		termconf_live.show_buttons = termconf->show_buttons;
 		termconf_live.show_config_links = termconf->show_config_links;
 
-		topics |= TOPIC_CHANGE_TITLE | TOPIC_CHANGE_BUTTONS;
+		topics |= TOPIC_CHANGE_TITLE | TOPIC_CHANGE_BUTTONS | TOPIC_CHANGE_BACKDROP;
 	}
 
 	// initial values in the save buffer in case of receiving restore without storing first
@@ -1009,6 +1016,18 @@ screen_set_button_text(int num, const char *text)
 	NOTIFY_DONE(TOPIC_CHANGE_BUTTONS);
 }
 
+/**
+ * Helper function to set terminalbackdrop
+ * @param url - url
+ */
+void ICACHE_FLASH_ATTR
+screen_set_backdrop(const char *url)
+{
+	NOTIFY_LOCK();
+	strncpy(termconf_live.backdrop, url, TERM_BACKDROP_LEN);
+	NOTIFY_DONE(TOPIC_CHANGE_BACKDROP);
+}
+
 /**
  * Shift screen upwards
  */
@@ -1794,6 +1813,20 @@ utf8_remap(char *out, char g, char charset)
 			}
 			break;
 
+		case CS_2_BLOCKS_LINES: /* ESPTerm Character Rom 2 */
+			if ((g >= CODEPAGE_2_BEGIN) && (g <= CODEPAGE_2_END)) {
+				n = codepage_2[g - CODEPAGE_2_BEGIN];
+				if (n) utf = n;
+			}
+			break;
+
+		case CS_3_LINES_EXTRA: /* ESPTerm Character Rom 3 */
+			if ((g >= CODEPAGE_3_BEGIN) && (g <= CODEPAGE_3_END)) {
+				n = codepage_3[g - CODEPAGE_3_BEGIN];
+				if (n) utf = n;
+			}
+			break;
+
 		case CS_A_UKASCII: /* UK, replaces # with GBP */
 			if (g == '#') utf = 0x20a4; // £
 			break;
@@ -1893,6 +1926,7 @@ screenSerializeToBuffer(char *buffer, size_t buf_len, ScreenNotifyTopics topics,
 #define TOPICMARK_BELL    '!'
 #define TOPICMARK_CURSOR  'C'
 #define TOPICMARK_SCREEN   'S'
+#define TOPICMARK_BACKDROP 'W'
 
 	if (ss == NULL) {
 		// START!
@@ -2011,9 +2045,11 @@ screenSerializeToBuffer(char *buffer, size_t buf_len, ScreenNotifyTopics topics,
 			bufput_c(TOPICMARK_TITLE);
 
 			int len = (int) strlen(termconf_live.title);
-			memcpy(bb, termconf_live.title, len);
-			bb += len;
-			remain -= len;
+			if (len > 0) {
+				memcpy(bb, termconf_live.title, len);
+				bb += len;
+				remain -= len;
+			}
 			bufput_c('\x01');
 		END_TOPIC
 
@@ -2024,13 +2060,27 @@ screenSerializeToBuffer(char *buffer, size_t buf_len, ScreenNotifyTopics topics,
 
 			for (int i = 0; i < TERM_BTN_COUNT; i++) {
 				int len = (int) strlen(termconf_live.btn[i]);
-				memcpy(bb, termconf_live.btn[i], len);
-				bb += len;
-				remain -= len;
+				if (len > 0) {
+					memcpy(bb, termconf_live.btn[i], len);
+					bb += len;
+					remain -= len;
+				}
 				bufput_c('\x01');
 			}
 		END_TOPIC
 
+		BEGIN_TOPIC(TOPIC_CHANGE_BACKDROP, TERM_BACKDROP_LEN+1+1)
+			bufput_c(TOPICMARK_BACKDROP);
+
+			int len = (int) strlen(termconf_live.backdrop);
+			if (len > 0) {
+				memcpy(bb, termconf_live.backdrop, len);
+				bb += len;
+				remain -= len;
+			}
+			bufput_c('\x01');
+		END_TOPIC
+
 		BEGIN_TOPIC(TOPIC_INTERNAL, 45)
 			bufput_c(TOPICMARK_DEBUG);
 			// General flags

user/screen.h

@@ -38,6 +38,7 @@
 #define TERM_BTN_MSG_LEN 10
 #define TERM_TITLE_LEN 64
 #define TERM_BTN_COUNT 5
+#define TERM_BACKDROP_LEN 100
 
 #define SCR_DEF_DISPLAY_TOUT_MS 12
 #define SCR_DEF_DISPLAY_COOLDOWN_MS 35
@@ -74,8 +75,8 @@ enum CursorShape {
 
 // Size designed for the terminal config structure
 // Must be constant to avoid corrupting user config after upgrade
-#define TERMCONF_SIZE 300
-#define TERMCONF_VERSION 3
+#define TERMCONF_SIZE 400
+#define TERMCONF_VERSION 4
 
 typedef struct {
 	u32 width;
@@ -100,6 +101,7 @@ typedef struct {
 	bool debugbar;
 	bool allow_decopt_12;
 	bool ascii_debug;
+	char backdrop[TERM_BACKDROP_LEN];
 } TerminalConfigBundle;
 
 // Live config
@@ -148,6 +150,8 @@ void screen_resize(int rows, int cols);
 void screen_set_title(const char *title);
 /** Set a button text */
 void screen_set_button_text(int num, const char *text);
+/** Change backdrop */
+void screen_set_backdrop(const char *url);
 
 // --- Encoding ---
 
@@ -156,6 +160,8 @@ typedef enum {
 	CS_A_UKASCII = 'A',
 	CS_0_DEC_SUPPLEMENTAL = '0',
 	CS_1_DOS_437 = '1',
+	CS_2_BLOCKS_LINES = '2',
+	CS_3_LINES_EXTRA = '3',
 } CHARSET;
 
 enum ScreenSerializeTopic {
@@ -167,6 +173,7 @@ enum ScreenSerializeTopic {
 	TOPIC_CHANGE_CURSOR       = (1<<5),
 	TOPIC_INTERNAL            = (1<<6), // debugging internal state
 	TOPIC_BELL                = (1<<7), // beep
+	TOPIC_CHANGE_BACKDROP     = (1<<8),
 	TOPIC_FLAG_NOCLEAN        = (1<<15), // do not clean dirty extents
 
 	// combos
@@ -175,6 +182,7 @@ enum ScreenSerializeTopic {
 		TOPIC_CHANGE_CONTENT_ALL |
 		TOPIC_CHANGE_CURSOR |
 		TOPIC_CHANGE_TITLE |
+		TOPIC_CHANGE_BACKDROP |
 		TOPIC_CHANGE_BUTTONS,
 };
 

user/uart_handler.c

@@ -52,6 +52,7 @@ void ICACHE_FLASH_ATTR UART_Init(void)
 
 	// U0RXD
 	PIN_FUNC_SELECT(PERIPHS_IO_MUX_U0RXD_U, FUNC_U0RXD);
+	PIN_PULLUP_DIS(PERIPHS_IO_MUX_U0RXD_U);
 
 	// U1TXD (GPIO2)
 	PIN_FUNC_SELECT(PERIPHS_IO_MUX_GPIO2_U, FUNC_U1TXD_BK);

user/user_main.c

@@ -74,12 +74,12 @@ static void ICACHE_FLASH_ATTR prHeapTimerCb(void *arg)
 	if (diff == 0) {
 		if (cnt == 5) {
 			// only every 5 secs if no change
-			dbg("Rx: %2d%c, Tx: %2d%c, Hp: %d", rxp, '%', txp, '%', heap);
+			dbg("Rx/Tx: %d/%d%c, Hp: %d", rxp, txp, '%', heap);
 			cnt = 0;
 		}
 	} else {
 		// report change
-		dbg("Rx: %2d%c, Tx: %2d%c, Hp: %d (%s%d)", rxp, '%', txp, '%', heap, cc, diff);
+		dbg("Rx/Tx: %d/%d%c, Hp: %d (%s%d)", rxp, txp, '%', heap, cc, diff);
 		cnt = 0;
 	}
 
@@ -104,14 +104,22 @@ void ICACHE_FLASH_ATTR user_init(void)
 	wifi_station_set_auto_connect(false);
 	wifi_set_opmode(NULL_MODE); // saves to flash if changed - this might avoid the current spike on startup?
 
-	printf("\r\n");
-	banner("====== ESPTerm ======");
-	banner_info("Firmware (c) Ondrej Hruska, 2017");
-	banner_info(TERMINAL_GITHUB_REPO);
-	banner_info("");
-	banner_info("Version "FIRMWARE_VERSION",");
-	banner_info("built " __DATE__ " at " __TIME__ " " __TIMEZONE__);
-	printf("\r\n");
+	u8 mac[6];
+	wifi_get_macaddr(SOFTAP_IF, mac);
+
+	banner_gap();
+	banner("================ ESPTerm ================");
+	banner_info();
+	banner_info("Project by Ondrej Hruska, 2017");
+	banner_info();
+	banner_info(TERMINAL_GITHUB_REPO_NOPROTO);
+	banner_info();
+	banner_info("Version "FW_VERSION" ("ESP_LANG"), code name "FW_CODENAME_QUOTED);
+	banner_info(" back-end #"GIT_HASH_BACKEND" front-end #"GIT_HASH_FRONTEND);
+	banner_info(" built "__DATE__" at "__TIME__" "__TIMEZONE__);
+	banner_info();
+	banner_info("Device ID: %02X%02X%02X", mac[3], mac[4], mac[5]);
+	banner_gap();
 
 	ioInit();
 
@@ -123,11 +131,6 @@ void ICACHE_FLASH_ATTR user_init(void)
 	espFsInit((void *) (webpages_espfs_start));
 #endif
 
-#if DEBUG_HEAP
-	// Heap use timer & blink
-	TIMER_START(&prHeapTimer, prHeapTimerCb, HEAP_TIMER_MS, 1);
-#endif
-
 	// do later (some functions do not work if called from user_init)
 	TIMER_START(&userStartTimer, user_start, 10, 0);
 }
@@ -139,13 +142,20 @@ static void ICACHE_FLASH_ATTR user_start(void *unused)
 
 	captdnsInit();
 	httpdInit(routes, 80);
-	httpdSetName("ESPTerm " FIRMWARE_VERSION);
+	httpdSetName("ESPTerm " VERSION_STRING);
 
 	ansi_parser_inhibit = false;
 
 	// Print the CANCEL character to indicate the module has restarted
 	// Critically important for client application if any kind of screen persistence / content re-use is needed
 	UART_WriteChar(UART0, CAN, UART_TIMEOUT_US); // 0x18 - 24 - CAN
+
+	dbg("tsize=%d", sizeof(TerminalConfigBundle));
+
+#if DEBUG_HEAP
+	// Heap use timer & blink
+	TIMER_START(&prHeapTimer, prHeapTimerCb, HEAP_TIMER_MS, 1);
+#endif
 }
 
 // ---- unused funcs removed from sdk to save space ---

user/version.h

@@ -5,16 +5,25 @@
 #ifndef ESP_VT100_FIRMWARE_VERSION_H
 #define ESP_VT100_FIRMWARE_VERSION_H
 
-#include "helpers.h"
+#define STR_HELPER(x) #x
+#define STR(x) STR_HELPER(x)
 
 #define FW_V_MAJOR 2
-#define FW_V_MINOR 1
+#define FW_V_MINOR 2
 #define FW_V_PATCH 0
-#define FW_CODENAME "Anthill" // 2.1.0
+#define FW_V_SUFFIX ""
+#define FW_CODENAME "Bluet" // 2.2
+#define FW_CODENAME_QUOTED "\""FW_CODENAME"\""
+
+#define FW_VERSION STR(FW_V_MAJOR) "." STR(FW_V_MINOR) "." STR(FW_V_PATCH) FW_V_SUFFIX
+
+#define VERSION_STRING FW_VERSION " " FW_CODENAME_QUOTED
 
-#define FIRMWARE_VERSION STR(FW_V_MAJOR) "." STR(FW_V_MINOR) "." STR(FW_V_PATCH) " \"" FW_CODENAME "\""
 #define FIRMWARE_VERSION_NUM (FW_V_MAJOR*1000 + FW_V_MINOR*10 + FW_V_PATCH) // this is used in ID queries
-#define TERMINAL_GITHUB_REPO "https://github.com/espterm/espterm-firmware"
+
+#define TERMINAL_GITHUB_REPO_NOPROTO "github.com/espterm/espterm-firmware"
+#define TERMINAL_GITHUB_REPO "https://"TERMINAL_GITHUB_REPO_NOPROTO
+
 #define TERMINAL_GITHUB_REPO_FRONT "https://github.com/espterm/espterm-front-end"
 
 #endif //ESP_VT100_FIRMWARE_VERSION_H

user/wifimgr.c

@@ -8,6 +8,22 @@
 WiFiConfigBundle * const wificonf = &persist.current.wificonf;
 WiFiConfChangeFlags wifi_change_flags;
 
+int ICACHE_FLASH_ATTR getStaIpAsString(char *buffer)
+{
+	WIFI_MODE x = wifi_get_opmode();
+	STATION_STATUS connectStatus = wifi_station_get_connect_status();
+
+	if (x == SOFTAP_MODE || connectStatus != STATION_GOT_IP || wificonf->opmode == SOFTAP_MODE) {
+		strcpy(buffer, "");
+		return 0;
+	}
+	else {
+		struct ip_info info;
+		wifi_get_ip_info(STATION_IF, &info);
+		return sprintf(buffer, IPSTR, GOOD_IP2STR(info.ip.addr));
+	}
+}
+
 /**
  * Restore defaults in the WiFi config block.
  * This is to be called if the WiFi config is corrupted on startup,

user/wifimgr.h

@@ -60,6 +60,8 @@ void wifimgr_restore_defaults(void);
 
 void wifimgr_apply_settings(void);
 
+int getStaIpAsString(char *buffer);
+
 #if DEBUG_WIFI
 #define wifi_warn warn
 #define wifi_dbg dbg