ESP8266 - Status 19

[sgs77]

Hello ! First of all, congratulations on the project, and sorry for my translated English. I have a wemos d1 with the 485, with the mqtt firmware in Home Assistant, it connects perfectly with HA, and Mqtt, but it only transmits the data for a couple of seconds, then the status pin returns 3 and 19 alternately.
I have done several configurations and tests and I always get the same result. Any ideas ?

[Bettapro]

Hello!

So, first of all:

• 3 (1+2) means some of the variable cannot be synced (sent to blynk/ha/mqtt) due a communication error between esp and the solar charge controller
• 19 (1+2+16) is similar the the previous case, but, it adds that something detects the solar charge controller is not responding

Communication between esp and scc is not ok 😄

You should check the serial log first, esp will check the connection during the startup, maybe you can get something.
I would double check all the connections to make sure the wiring is correct, and the problem is caused by something else.

Then... to proceed with the investigation:

• esp32 or esp8266?
• did you flash one of the precompiled bin files (if so, which one?) or did you compiled it?
• solar charge controller model?
• attach a complete serial log (from the early startup, until setup is completed)
• some photos about your setup (how your esp + rs485 + scc are connected) should help as well

[sgs77]

Ok, I will collect the information, the solar charger model is the 3210AN.

I am using a wemos d1 Mini, Esp8266. with the image already configured for mqtt and Home Assistant.

I attach a photo of the configuration, but comment that I have done several tests with another rs485 and another wemos d1 on a test board and I always get the same results.

Initially it transmits once or twice, but on the third refresh it already puts 3 and 19 in status, before sometimes 7, 8 or 17 I have also seen it. I try to pull a boot log and upload it.

[sgs77]

I have tried feeding the rs485, with 3v and with 5v, and the same result. I have also tried to join the two A and the two B of the tracer signal with the rs485. But with the same result.

[sgs77]

Also comment, that I understand that the Tracer's rj45 port is fine, because with the MT50 screen, it works correctly.

[sgs77]

I'll try to find some time in these days to replicate and test your setup as well, so we can solve this issue.

Thank you !!! 🙂

[sgs77]

Hello ! In case it is useful for any clue, I have done another test, the result is similar, I attach the test carried out.

-

https://vimeo.com/700076547

[Bettapro]

Please flash the firmware attached and let me know if the situation improves (bin file inside firmware.zip)
firmware.zip

[sgs77]

Hello ! downloaded and installed the firmware. For now, it is working the first time, there are some occasional errors when reading in modbus, but the connection is stable and transmits the data to Home Assistant perfectly. Congratulations, I feel very happy.

[Bettapro]

Happy to see that! 😄
I replicated your setup and I had the same issue you reported, esp8266 wasn't working, esp32 was fine.
The problem was caused by the fact that esp8266 has one serial port shared between debug and modbus messages (esp32 uses a dedicated port for each comm. ).
ESP8266 requires a careful management of RX/TX serial buffers to avoid message collision, this firmware is the first attemp that gives good results on my tests.
I'll work a little on this topic(hoping to find a cleaner and more stable solution) then I'll publish a new release.

[Bettapro]

Please flash the firmware attached and let me know if the situation improves (bin file inside firmware.zip) firmware.zip

Happy to see that! 😄 I replicated your setup and I had the same issue you reported, esp8266 wasn't working, esp32 was fine. The problem was caused by the fact that esp8266 has one serial port shared between debug and modbus messages (esp32 uses a dedicated port for each comm. ). ESP8266 requires a careful management of RX/TX serial buffers to avoid message collision, this firmware is the first attemp that gives good results on my tests. I'll work a little on this topic(hoping to find a cleaner and more stable solution) then I'll publish a new release.

As reference, until v3.0.6

[sgs77]

Perfect ! congratulations on the job.