SOLVED mcp23017 on esp8266 running firmata

[claudio]

hello there

Lastly, I was trying to get running an IO expander MCP23017 connected on a ESP8266 (via I2C) and running firmata. All seem's ok except there is no READINGS appearing in LIST :

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Internals:
   CFGFN     
   DEF        0x20
   FUUID      5f3c2a18-f33f-d74b-23f1-9f0e7116fc54af16
   I2C_Address 32
   IODev      myFirmataESP8266
   NAME       myMcp23017
   NR         134
   STATE      Initialized
   TYPE       I2C_MCP23017
Attributes:
   IODev      myFirmataESP8266
   Interrupt  B0,B1,B2,B3,B4,B5,B6,B7
   InterruptOut separate_active-low
   OutputPorts A7
   Pullup     B0,B1,B2,B3,B4,B5,B6,B7
   event-on-change-reading PortB0,PortB1,PortB2,PortB3,PortB4,PortB5,PortB6,PortB7
   invert_input B0,B1,B2,B3,B4,B5,B6,B7
   room       Firmata
   
I can however activate some output, I've tried A7 for exemple and it works.

I've dedicated a pin on the ESP for interrupt handling :

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Internals:
   DEF        16
   FUUID      5f3c2069-f33f-d74b-0969-b647d6189dee6e51
   IODev      myFirmataESP8266
   NAME       esp8266_gpio16
   NR         121
   PIN        16
   STATE      off
   TYPE       FRM_IN
   READINGS:
     2020-08-18 21:38:43   reading         off
     2020-08-18 22:05:08   state           Initialized
Attributes:
   IODev      myFirmataESP8266
   activeLow  yes
   comment    gpio affectée a recevoir les interruptions du IO expander
   internal-pullup off
   room       Firmata
   stateFormat reading
   userReadings test {fhem "get myMcp23017"}
   
The esp pin affected to interrupt is triggered as it should when I push a button on the mcp, no problem here


I've made the same setup on a raspi except I've used RPII2C type instead of FRM type, and it works as expected, I see all Port(s) in READINGS

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Internals:
   CHANGED   
   DEF        0x20
   FUUID      581b7175-f33f-d74b-34ac-49cbc1815e7bf979
   I2C_Address 32
   IODev      myRaspiI2C
   NAME       myMcp23017
   NR         136
   STATE      transmission error
   TYPE       I2C_MCP23017
   myRaspiI2C_SENDSTAT regerror
   READINGS:
     2020-08-17 22:45:36   PortA0          off
     2020-08-17 22:45:37   PortA1          off
     2020-08-17 22:45:37   PortA2          off
     2020-08-17 22:45:37   PortA3          off
     2020-08-17 22:45:37   PortA4          off
     2020-08-17 22:45:37   PortA5          off
     2020-08-17 22:45:37   PortA6          off
     2020-08-17 23:36:05   PortA7          off
     2020-08-17 23:36:05   PortB0          off
     2020-08-17 00:15:27   PortB1          off
     2020-08-17 22:13:46   PortB2          off
     2020-08-17 00:15:27   PortB3          off
     2020-08-17 00:15:27   PortB4          off
     2020-08-17 00:15:27   PortB5          off
     2020-08-17 23:29:59   PortB6          off
     2020-08-17 00:15:27   PortB7          off
     2020-08-18 22:42:13   state           transmission error
Attributes:
   IODev      myRaspiI2C
   Interrupt  B0,B1,B2,B3,B4,B5,B6,B7
   InterruptOut separate_active-low
   OutputPorts A0,A7
   Pullup     B0,B1,B2,B3,B4,B5,B6,B7
   event-on-change-reading PortB0,PortB1,PortB2,PortB3,PortB4,PortB5,PortB6,PortB7
   invert_input B0,B1,B2,B3,B4,B5,B6,B7
   room       I2C direct connect

https://i.postimg.cc/KvRVwg28/IMG-20200818-225630.jpg
   
Do you know what's wrong ??  why is there no input ports  ?

[claudio]

I respond to myself but it can serve others...

I've simply forgotten the attribute i2c-config :

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attr myFirmataESP8266 i2c-config 1

after that, all ports appeared as expected.