Errors reading from Solar Module

[proddy]

@Bartekn86 wrote:

i get 2021-09-16 15:46:26.392 ERROR 671: [telegram] Last Tx Read operation failed after 3 retries. Ignoring request: 0B B0 FF 03 20 02 62 2021-09-16 15:55:18.997 ERROR 672: [telegram] Last Tx Read operation failed after 3 retries. Ignoring request: 0B B0 FF 03 20 02 58 2021-09-16 15:58:03.506 ERROR 673: [telegram] Last Tx Read operation failed after 3 retries. Ignoring request: 0B 88 19 03 20 2021-09-16 15:58:40.901 ERROR 674: [telegram] Last Tx Read operation failed after 3 retries. Ignoring request: 0B B0 FF 03 20 02 63 2021-09-16 16:10:30.787 ERROR 675: [telegram] Last Tx Read operation failed after 3 retries. Ignoring request: 0B B0 FF 03 20 02 62

i have replaced esp8266 to esp32, and added a sm200 module, im not sure what device generate this frames, could be sth wrong with solar module ?

Originally posted by @Bartekn86 in https://github.com/emsesp/EMS-ESP32/issues/107#issuecomment-920940048

[proddy]

@Bartekn86 did it work previously in V2 (the ESP8266)?

[Bartekn86]

I'm not sure, I wouldn't want to mislead you

[proddy]

can you post your system info (from web console, go to help)

[Bartekn86]

sure emsesp_system_info-1.txt

[MichaelDvP]

I was a bit confused by the offset 03, but this was only a bug in reporting (fixed now). There is also a read fail on boiler telegram 19, it's not only solar. Tx-errors are often power issues. How is the emsesp powered? If 8266 was bus-powered, and esp32 is usb-powered don't forget to remove the jumper/powermodule.

BTW: A few days ago i've tested MH-ET32 buspowered with low clock, low bandwidth and tx-power 8 dBm, working with ~90% tx and 90% rx quality, that's mainly the same i get with 8266. (with servicejack power it's always 100% quality).

[Bartekn86]

i have esp32 with usb-power, jumper removed firstly :-)

[MichaelDvP]

Your system info looks ok, there is only one tx-error in 55 sends and 99% quality. Also the first post shows for solar telegram 02 62 the errors 671 and 675 with time difference of 24 minutes. The telegram is polled every minute, so we have 23 successfull polls between these errors. It's not perfect but nothing to worry about and the solar telegrams are working. You can try to if it gets better with different bus connections, shorter/longer/thicker cables, etc.

[Bartekn86]

thank you, i will try with a bit longer cables between esp and bc25. theses are shorter than 100mm, meyby this is a problem.. hm...

[Bartekn86]

nothing change after replace wire, prolong wires, itp, itd. I have 100 % rx and tx quality, and still 2021-09-18 22:28:05.134 ERROR 93784: [telegram] Last Tx Read operation failed after 3 retries. Ignoring request: 0B 90 FF 19 20 01 A5

[proddy]

@Bartekn86 did you try with v3.4 and lowering the WiFi transmit power?