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-rw-r--r--how_to_flash_lolin_nodemcu_v3.html19
1 files changed, 19 insertions, 0 deletions
diff --git a/how_to_flash_lolin_nodemcu_v3.html b/how_to_flash_lolin_nodemcu_v3.html
index 1723e14..fcdc724 100644
--- a/how_to_flash_lolin_nodemcu_v3.html
+++ b/how_to_flash_lolin_nodemcu_v3.html
@@ -4,6 +4,7 @@
<meta name="author" content="aki">
<meta name="tags" content="tutorial, flash, nodemcu, firmware, nodemcu">
<meta name="published-on" content="2020-06-29T17:58:00+02:00">
+<meta name="last-modified-on" content="2023-01-06T17:32:00+01:00">
<link rel="icon" type="image/png" href="favicon.png">
<link rel="stylesheet" type="text/css" href="style.css">
@@ -45,5 +46,23 @@ $ screen <u>/dev/ttyUSB0</u> 115200
$ st -l <u>/dev/ttyUSB0</u> 115200
</pre>
<img src="how_to_flash_lolin_nodemcu_v3-1.png" alt="nodemcu drawing">
+<p>In case the device does not appear. Check whether appropriate module (usually ch341) is loaded with:
+<pre>
+$ lsmod | grep -i ch34.
+ch341 28672 0
+</pre>
+<p>To check if it was compiled:
+<pre>
+$ zgrep -i CH34. /proc/config.gz
+CONFIG_USB_SERIAL_CH341=m
+</pre>
+<p>Finally, if you want a non-root user to be able to use it, assign system appropriate group. Usually it's
+<u>serial</u> but it is not a requirement. You can check what group user needs by simply looking at the file
+permissions:
+<pre>
+$ ls -l <u>/dev/ttyUSB0</u>
+crw-rw---- 1 root uucp 188, 0 Jan 6 17:16 /dev/ttyUSB0
+$ sudo usermod -aG <u>uucp</u> <u>user</u>
+</pre>
</article>
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