add new esp-env stuff

input/projects/smarthome/espenv.md

 title: ESP-Env
-description: ESP32 / ESP8266 & BME280 / SHT2x sensor with InfluxDB support
+description: ESP32 / ESP8266 & BME280 / SHT2x / CCS811 sensor / actor with InfluxDB support
 parent: smarthome
 git: https://git.xythobuz.de/thomas/esp-env
 github: https://github.com/xythobuz/esp-env
 position: 100
 date: 2020-01-06
-update: 2022-05-26
+update: 2022-08-21
 comments: true
 ---
 
     [ "img/espenv_2.png", "Temperature data from ca. 7 months" ]
 ])
 %-->
-
-Here are some more photos of the PCBs I made.
 All of the boards, except one, work fine.
 The non-working one is just not connecting to WiFi, regardless of which specific ESP8266 I plug in there.
 I have no explanation for this, unfortunately.
 
+<div class="collapse">Some more photos of the PCBs I made.</div>
+<div class="collapsecontent">
 <!--%
 lightgallery([
     [ "img/esp_env_relais_1.jpg", "Bathroom Relais in Box" ],
     [ "img/espenv_18.jpg", "SHT21 kitchen, back" ]
 ])
 %-->
+</div>
 
 The source code can be found [on my Gitea server](https://git.xythobuz.de/thomas/esp-env).
 
+## Relais Update (August 2022)
+<a class="anchor" name="relais_update"></a>
+
+After successfully using the first [4x relais board](https://amzn.to/3FQdOXB) I ordered to control my bathroom lights and fan for a couple of months, I decided to use two more of the same boards for my livingroom lights.
+This turned out to be quite the feat however.
+
+I initially set up the devices as before without issues, fixing and cleaning up some stuff in the code along the way.
+When connecting the load, in my case LED driver modules, the issues started to appear however.
+
+<!--%
+lightgallery([
+    [ "img/esp_env_relais_scope_1.bmp", "Scope trace of Vcc and RST spikes" ],
+    [ "img/esp_env_relais_scope_2.bmp", "Scope trace of Vcc and RST spikes" ],
+    [ "img/esp_env_relais_scope_3.bmp", "Scope trace of Vcc and RST spikes" ],
+    [ "img/esp_env_relais_scope_4.bmp", "Scope trace of Vcc and RST spikes" ],
+    [ "img/esp_env_relais_scope_5.bmp", "Scope trace of Vcc and RST spikes" ],
+])
+%-->
+
+The ESP8266 simply reset nearly everytime it tried to switch a load.
+Investigating with an oscilloscope, it turns out there were nasty spikes on both the supply voltage and the reset pin.
+Keep in mind, for the screenshots above I already added a bunch of capacitors (100uF, 100nF, 22pF) to both lines, without any change.
+I tried out literally every option I could find suggested in online discussions, like connecting GND of the circuit to PE, switching neutral instead of the phase, adding pull-ups for RST, adding capacitors.
+I even bought a filter module for 220V to put in front of the drivers.
+Nothing helped.
+
+<!--%
+lightgallery([
+    [ "img/esp_env_relais_test_1.jpg", "One of the two new relais setups, with power supply." ],
+    [ "img/esp_env_relais_test_2.jpg", "Close-up of ESP-01 with capacitors for testing." ],
+])
+%-->
+
+Getting kinda desperate, I remembered someone online mentioned that "ESP-01s" modules are not only equipped with more memory, they also have better EMV resistance for some reason.
+This sounded strange to me, but nonetheless I ordered some ESP-01s modules instead of the ESP-01 I had before.
+And it worked!
+No problems at all with the new ESPs.
+
 ## License
 
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input/projects/smarthome/mqtt_web.md

 
 <!--%
 lightgallery([
-    [ "img/mqtt_lights_web.png", "Screenshot of Lights Control" ],
+    [ "img/mqtt_lights_web_2.png", "Screenshot of Livingroom controls" ],
+    [ "img/mqtt_lights_web.png", "Screenshot of Bathroom controls" ],
 ])
 %-->