ESP32/ESP8266 RS485 gateway - example needed

  • Hi there!
    Did anyone tried (successfuly) to use ESP32 as gateway for RS485 nodes?
    So far I tried to (testing on ESP8266):

    1. ...use example for Serial Gateway: but no success. AltSoftwareSerial is not working with ESP32, it won't compile,
    2. for solution to replace AltSoftwareSerial to EspSoftwareSerial - but nothing found,
    3. ...change to HWSerial (#define MY_RS485_HWSERIAL Serial1 // also checked with Serial) but there is no data "comming out" from TX pin (except ESP "junk" and the start),

    Some debug info:

    381282 TSM:FAIL:RE-INIT
    381284 TSM:INIT
    381285 TSM:INIT:TSP OK
    381287 TSF:SID:OK,ID=10
    381290 TSM:FPAR
    381308 ?TSF:MSG:SEND,10-10-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
    383316 !TSM:FPAR:NO REPLY
    383319 TSM:FPAR
    383337 ?TSF:MSG:SEND,10-10-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
    385345 !TSM:FPAR:NO REPLY
    385347 TSM:FPAR
    385366 ?TSF:MSG:SEND,10-10-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
    387374 !TSM:FPAR:NO REPLY
    387376 TSM:FPAR
    387394 ?TSF:MSG:SEND,10-10-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK:
    389402 !TSM:FPAR:FAIL
    389404 TSM:FAIL:CNT=7
    389406 TSM:FAIL:DIS
    389408 TSF:TDI:TSL
    • the data is transmitted out to RS485 (checked with another TTL-USB converter), hex:
    01 FF 0A 58 07 02 0A 0A FF 02 03 07 FF 03 86 04
    • the data is received from RS485 (same content) as above - DE/RE pins are controlled from ESP (at least Low State is set)
    • RO is connected to RX pin at ESP32
    • no response is comming out from TX pin (except junk at start)

    The code:
    Thanks in advance for hints!

  • @Konrad-Winiarski i tried this in the last days as well. It seems as if AltSoftSerial would be working if the right module names in the library boards definitions would be included. I searched for the wemos d1 mini and lolin esp32 lines but could not find them up to now.

    Did you come any further since your post in 2021?

  • Dual Transport (dual bus)

    Yes a Gateway with several buses or a Node with two different buses would be a good thing.

    You may have seen the post and the version of @tekka
    . maybe not a problem for you
    "tekka's personal fork from the MySensors 2.4 branch and has not been updated"

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