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34 lines
1.8 KiB
34 lines
1.8 KiB
7 years ago
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<div class="Box fold">
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<h2>Tips & Troubleshooting</h2>
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<div class="Row v">
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<ul>
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<li>*Communication UART (Rx, Tx)* can be configured in the <a href="<?= url('cfg_system') ?>">System Settings</a>.
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<li>*Boot log and debug messages* are available on pin *GPIO2* (P2) at 115200\,baud, 1 stop bit, no parity.
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Those messages may be disabled through compile flags.
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<li>*Loopback test*: Connect the Rx and Tx pins with a piece of wire. Anything you type in the browser should
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appear on the screen. Set _Parser Timeout = 0_ in <a href="<?= url('cfg_term') ?>">Terminal Settings</a>
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to be able to manually enter escape sequences.
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<li>There is very little RAM available to the webserver, and it can support at most 4 connections at the same time.
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Each terminal session (open window with the terminal screen) uses one persistent connection for screen updates.
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*Avoid leaving unused windows open*, or either the RAM or connections may be exhausted.
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<li>*For best performance*, use the module in Client mode (connected to external network) and minimize the number
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of simultaneous connections. Enabling AP consumes extra RAM because the DHCP server and Captive Portal
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DNS server are started.
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<li>In AP mode, *check that the WiFi channel used is clear*; interference may cause flaky connection.
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A good mobile app to use for this is
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<a href="https://play.google.com/store/apps/details?id=com.farproc.wifi.analyzer">WiFi Analyzer (Google Play)</a>.
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Adjust the hotspot strength and range using the _Tx Power setting_.
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<li>Hold the BOOT button (GPIO0 to GND) for ~1 second to force enable AP. Hold it for ~6 seconds to restore default settings.
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(This is indicated by the blue LED rapidly flashing). Default settings can be overwritten in the
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<a href="<?= url('cfg_system') ?>">System Settings</a>.
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</ul>
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</div>
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</div>
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