Nrf52832 Communication with ESP8266 over i2c.

RE: Nrf52832 Communication with ESP8266 over i2c.

awneil — Mon, 08 Jul 2019 14:55:00 GMT

[quote userid="79808" url="~/f/nordic-q-a/49484/nrf52832-communication-with-esp8266-over-i2c/197140"]ESP doesn't support slave configurations[/quote]

So how did this ever work:

[quote userid="79808" url="~/f/nordic-q-a/49484/nrf52832-communication-with-esp8266-over-i2c"]My i2c code in nodemcu is working fine as I had tested the communication between two node mcu[/quote]

Anyhow, as it's not a Nordic issue, you mark your answer as the solution:

RE: Nrf52832 Communication with ESP8266 over i2c.

Vaibhav_Bansal — Mon, 08 Jul 2019 12:49:48 GMT

actually the issue is on ESP side. ESP doesn't support slave configurations. I am looking for solution on esp forum thanks.

RE: Nrf52832 Communication with ESP8266 over i2c.

awneil — Mon, 08 Jul 2019 10:59:33 GMT

So think about what that tells you ...

RE: Nrf52832 Communication with ESP8266 over i2c.

Vaibhav_Bansal — Mon, 08 Jul 2019 10:55:57 GMT

nrf is able to detect other peripherals but can't able to detect the nodemcu.

RE: Nrf52832 Communication with ESP8266 over i2c.

Vaibhav_Bansal — Mon, 08 Jul 2019 10:13:50 GMT

I am working on this approach.

RE: Nrf52832 Communication with ESP8266 over i2c.

awneil — Mon, 08 Jul 2019 10:10:12 GMT

So you're blind, then!

You'll just have to play by trial and error.

Try smaller pullups.

Can your nRF Master see any other Slaves?

If you make the nRF Slave, and ESP Master - can the ESP see the nRF ?

RE: Nrf52832 Communication with ESP8266 over i2c.

Vaibhav_Bansal — Mon, 08 Jul 2019 09:46:12 GMT

I know but currently I don't have it.

RE: Nrf52832 Communication with ESP8266 over i2c.

awneil — Mon, 08 Jul 2019 09:45:20 GMT

10k might be a bit high ...

An oscilloscope really is an indispensable piece of equipment for this stuff!

RE: Nrf52832 Communication with ESP8266 over i2c.

Vaibhav_Bansal — Mon, 08 Jul 2019 09:35:43 GMT

1. NRF is Mater and ESP is slave.

2. Schematic I can't share but give a brief here.

2.1 SCL _nrf to SCL_ esp.

2.2 SDA _nrf to SDA_ esp

2.3 GND.

2.4 10K pullup upto 3.3 V.

3. Yes I think I did.

4. No I don't have any.

RE: Nrf52832 Communication with ESP8266 over i2c.

awneil — Mon, 08 Jul 2019 09:29:39 GMT

So which one is the Master, and which one is the Slave?

Show a schematic of your connection between the 2 boards.

Are you sure you have (correct) pullups?

Have you used an Oscilloscope or analyser to see what's happening on the lines?