Differences

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--- sonoff [08.12.2018 09:57] – [Rules Engine - node-red] Pascal Suter
+++ sonoff [07.09.2021 05:52] (current) – [Making the installation permanent] Pascal Suter
@@ Line 39: / Line 39: @@
 I personally went for flashing over a USB TTL adapter using the Arduino IDE. It is important to notice, that the TTL adapter needs to provide 3.3V, not 5V! Also i recommend using a PL2303 based USB TTL adapter, as others did not work for me (spent hours trying until I finally gave up and tried with a PL2303 based one I had laying around). Another important Point was, how to enter the programming mode: Hold down the pushbutton while connecting only the power pins. Leave at least one of the two data pins disconnected. Then let go of the button and connect the RX and TX (crossed). Flasing did not work for me when i connected all wires at the same time while holding down the button.
-I strongly recommend to edit the settings before compiling and adding your wifi credentials, this will save some time and hassle when configuring the device later on. It will simply connect to your wifi and you can access its webpage to do the rest of the configuration.
+<del>I strongly recommend to edit the settings before compiling and adding your wifi credentials, this will save some time and hassle when configuring the device later on. It will simply connect to your wifi and you can access its webpage to do the rest of the configuration. </del> **Update**: don't do this! whenever possible, flash the stock ''tasmota.bin'' file, it is alot easier to do so and your sonoff will fall back to a setup mode if the wifi password has changed and it can no longer login.. also with new tools such as Tasmotizer, the credentials can be configured after flashing over the serial connection which makes it much easier than hardcoding and compiling your settings.
 Here are the steps it took to flash the stock sonoff (current and more detailed instructions can be found in the [[https://github.com/arendst/Sonoff-Tasmota/wiki/Arduino-IDE|Tasmota wiki]]
+**Update**: again, the instructions below are obsolete and may only be valid if you want to re-compile tasmota.. but you rarely will have to do that.. Instead i recommend using [[https://github.com/tasmota/tasmotizer|Tasmotizer]], a very simple python gui which can be installed using pip3 on Windows, linux and mac (for widows there is even an exe installer). besides flashing your tasmota compatible device it can also set your wifi settings and subsequently show the ip of the device as long as it is still attached to the serial interface.
+here are the steps using Tasmotizer:
+  * install tasmotizer: <code>
+pip3 install --upgrade pip wheel
+pip3 install tasmotizer
+tasmotizer.py</code>
+  * under "Select Image" choose "release" and then select whatever image you want to flash, in most cases this will be ''tasmota.bin''
+  * connect your sonoff to the serial2usb adapter WITH MAINS DISCONNECTED!! here is the necessary wiring.. note that rx and tx are crossed over between the two devices. VCC is 3.3V NOT 5V! {{:sonoff:pasted_20201130-140133.png}}
+  * here's the pinout for a shelly1 .. with the shelly1 you need to connect the gpio1 pin to ground whil you power it on in order to get it into flash mode.. {{:sonoff:pasted_20201204-194342.png}}
+  * hold down the push button and plug-in the usb adapter.
+  * let go of the push button and click "refresh" next to the "Select Port" drop down. most likely this will see and select your usb adapter
+  * click "Tasmotize" and wait for it to erase and reflash your device.
+  * once that is done, unplug your usb adapter and plug it back in, to reset the sonof
+  * now click on send config and enter your desired config, then upload it.
+  * a few seconds later, your sonoff sould be connected to your network and with Get IP you can now see the ip it got from your DHCP.
+If you really want to compile tasmota yourself, you should read the official documentation, as what follows now is already several years old and probably no longer exactly true. however, I wrote it, so here it is anyway :) ..
   - [[setup arduino IDE for ESP8266]]
   - download the sourcecode tar.gz or zip package from the [[https://github.com/arendst/Sonoff-Tasmota/releases|Tasmota releases page]]
@@ Line 183: / Line 205: @@
 copy the ''mqtt-dss-bridge'' ''config.js'' file to ''/usr/local/lib/node_modules/mqtt-dss-bridge/config.js''
+It happened a couple of times, that the  mqtt-dss-bridge process was running without actually updating the state of the dss target. this happened after some network issues for example. since the mqtt-dss-bridge process did not exit but rather continued to run and just do nothing, systemd did not notice any problem and did not restart the service. for that reason I created a little wrapper script which checks the age of the last status update and exits with exit code 1 if that state is older than 10 seconds for longer than 10 seconds (it usually takes a couple of seconds upon starting the gateway to catch up, hence we wait 10 addiitonal seconds before killing mqtt-dss-bridge and exiting with an error state)
+This wrapper also mutes the output of mqtt-dss-bridge which otherwise floods your syslog.
+save this script to a convenient location such as ''/usr/local/bin/mqtt-dss-bridge.sh''
+<code bash /usr/local/bin/mqtt-dss-bridge.sh>
+#!/bin/bash
+# start the bridge in the background
+/usr/bin/node /usr/local/lib/node_modules/mqtt-dss-bridge/index.js > /dev/null 2>&1 &
+PID=$!
+echo "DSS Bridge started with PID $PID"
+# start a loop to monitor the status every second
+errcntr=0
+lastUpdate=999
+while true; do
+    lastUpdate=$(( \
+            $(date +%s)\
+            -\
+            $(date -d "$(\
+                mosquitto_sub -h localhost -u sonoffs -P sonoff -t dss/state/lastDiscovered -C 1 | \
+                sed -E -e 's/"([0-9]{4}-[0-9]{2}-[0-9]{2})T([0-9]{2}:[0-9]{2}:[0-9]{2}).*$/\1 \2Z/'\
+            )" +%s)\
+        ))
+    if [ 10 -lt $lastUpdate ]; then
+            if [ $errcntr -lt 10 ]; then
+                let errcntr++
+                echo "DSS Bridge state is too old (last updated $lastUpdate seconds ago, max 10 allowed). This was failure $errcntr out of 10 accepted failures"
+            else
+                echo "DSS bridge state is still too old ($lastUpdate seconds) after 10 retries. killing mqtt-dss-bridge (pid $PID) and exit with error status 1"
+                kill $PID
+                exit 1
+            fi
+	fi
+    sleep 1
+done
+</code>
 create the startup service file for ''mqtt-dss-bridge'':
@@ Line 189: / Line 249: @@
 [Unit]
 Description=Node.js MQTT DSS Bridge
-Requires=mosquitto.service       # starts mosquitto first when this service is started manually
+# Requires the mosquitto service to run first
-After=mosquitto.service       # starts this after mosquitto on boot
+Requires=After=mosquitto.service
 [Service]
-ExecStart=/usr/bin/node /usr/local/lib/node_modules/mqtt-dss-bridge/index.js
+#ExecStartPre=/bin/sleep 60
+ExecStart=/usr/local/bin/mqtt-dss-bridge.sh
 # Required on some systems
 #WorkingDirectory=/usr/local/lib/node_modules/mqtt-dss-bridge/
 Restart=always
- # Restart service after 10 seconds if node service crashes
+ # Restart service after 10 seconds if wrapper exits with code > 0
 RestartSec=10
  # Output to syslog