[ESP8266 Witty Cloud][ESP-12E] - is it mandatory to use specific pins ?

[shafr]

Describe the bug Hello! I'm trying to build my own OpenMqttGateway PCB with bells and whistles. My instance contains sensors on with the voltage:

• 3.3v: IR-in, IR-out, DHT-11
• 5v: RF-in, RFout.
• ESP8266 Witty Cloud board.

Actual: When everything is connected on the breadboard with the default pin configuration as in default configuration file - it works great.

As soon as I'm trying to re-wire breadboard and update configuration files to be using different pins - everything falls apart.

I'm getting MQTT online message & version from board, but none of the sensors seems to report any data anymore at once - DHT11 not sending temperature, IR-recv not forwarding received signal to MQTT.

Before uploading every new firmware i'm re-writing my ESP with zeroes, so it's not likely that issue can be in software.

Expected: Should it be possible to set any sensor to any pin ? I'm avoiding no-use pins, (GPIO2, RST, CH_PD) but maybe i'm missing something.

Screenshots Just for info the schematic of sensors connection:

Configuration file specify sensors using GPIO pins.

Environment (please complete the following information):

• OpenMQTTGateway version 0.8.1
• I was using Arduino IDE with Generic ESP8266 board & NodeMCU board profile.
• All the required ESP8266 pins are connected - CH_PD, GPIO15, GPIO00,

[1technophile]

Hello,

If I sum up the constraint for pins selections here is what we have:

• RF or IR receiver should be on an interrupt pin
• HM10 should be on pin that can handle serial connection (not concerning you)
• I2C sensors should be connected to D1 & D2 (not concerning you) For the rest It should be ok to set any pins not affected to ESP special usage.

[shafr]

Ok, thank you for the answer! I will continue my investigation.

Can I add this information to a documentation for ESP8266 ? I will do a pull request later with documentation update with pins which were working for me for ESP and a new schematic / PCb.

[1technophile]

Yes of course, did you seen the pinout spreadsheet ? https://docs.google.com/spreadsheets/d/1_5fQjAixzRtepkykmL-3uN3G5bLfQ0zMajM9OBZ1bx0/edit?usp=drivesdk You can give me your feedback and i will update it

[shafr]

NodeMCU pin	GPIO PIN	RF Recv	RF Transmitter	IR Recv	IR Transmitter	DHT11
D0	16	OK	OK	NOK	OK	NOK
D1	5	OK	OK	OK	OK	OK
D2	4	OK	OK	OK	OK	OK
D3	0	NOK	NOK	NOK	NOK	NOK
D4	2	OK	OK	OK	OK	OK
D55	14	OK	OK	OK	OK	OK
D6	12	OK	OK	OK	OK	OK
D7	13	OK	OK	OK	OK	OK
D8	15	OK	OK	NOK	OK	OK
RX	3	OK	OK	OK	OK	OK
TX	1	OK	OK	NOK	OK	OK
S3	10	NOK	NOK	NOK	NOK	NOK
S2	9	NOK	NOK	NOK	NOK	NOK

[1technophile]

Wonderfull thanks !