Energy Monitoring on Sonoff S40 (BL602) - Feature Request/Driver Enable

[davygravy]

Describe the bug Sonoff S40 has the capability to monitor energy use via the CSE7759B chip (similar to CSE7766). Makes sense to have this enabled and usable.

Firmware:

• Version 1.15.158
• Device Sonoff S40
• Chip/model: BL602
• Device config - not applicable here

To Reproduce Steps to reproduce the behavior:

• already flashed my 2 of my S40s with OpenBL602 and they are working well. Just no way to turn on Energy Monitoring.

Screenshots

• not applicable here

Additional context

• From elektroda.com forum: https://www.elektroda.com/rtvforum/viewtopic.php?p=20228945#20228945
• from ESPHome: https://esphome.io/components/sensor/cse7766.html . This provides some background and links.
• It is my understanding that this sensor reads via UART/analog ; My understanding is that the CSE7759B is distinct from the CSE7759 (digital).
• The above sensor chips are --not-- in the HLW8012/BL0937/CSE7759 cadre, in my understanding.
• From Tasmota, a mention some sensor difficulties : https://github.com/arendst/Tasmota/issues/3573
• Found above article via this thread: https://github.com/xoseperez/espurna/issues/867
• https://github.com/ingeniuske/CSE7766
• From here (https://tinkerman.cat/post/sonoff-s31-now-serious/) I found the diagram of interest... And in tinkerman's article, he contrasts the two chips and how they tie into the rest of the circuitry. Notable are the comments about safety and opto-isolation.
  • CSE7766 datasheet : https://itead.cc/wp-content/uploads/2022/05/CSE7766.pdf

Certainly willing to test/assist.

[openshwprojects]

I'll take a look into that in the following days, I will most likely need you to copy the debug log from BL602, but that's when I add the UART read...

[davygravy]

Happy to do that, @openshwprojects. I've got one unit held back just for testing (others are deployed/in use). I updated/added to the "Additional context" section in first post : added in links that might be helpful [ for others reading this post - not really for you, since I see that you've been working on the driver here already : https://github.com/openshwprojects/OpenBK7231T_App/blob/main/src/driver/drv_cse7766.c ] :smiley:

I guess that these :

• BL0937CF
• BL0937CF1
• BL0937SEL

...will be joined by just 1 dropdown item, something like...

• CSE7766TI

[openshwprojects]

@davygravy , I replied on forum: https://www.elektroda.com/rtvforum/topic3889041-210.html my question is, which serial port do you need for that device? current,y uart0 is working for me - pins 16 and 7