Will a MQTTenabled esp publish input data directly to a rpi

[Joseph E. McFarland]

Hello geniuses of the MQTT nebula! I am Looking at using a mqtt protocol for a single sensor input wirelessly connected to my rasberry pi running python. I have no router or wifi in the area, so I want to connect a mqtt device directly via the wireless built-in my pi. Is this a supported function or is it dependent upon a gateway?

[Thomas]

Hi Joseph,

You can run an MQTT broker (mosquitto for instance) on the Raspberry Pi and also run a DHCP server on the Pi so that your sensor will get an IP address.

Hope that helps.

Thomas

[Andy Stanford-Clark]

You’ll also need to set up the WiFi on your Pi to act as an Access Point (I think that’s what Thomas meant, but didn’t mention ;))

Then your device can look for the Pi’s SSID, get a DHCP address from it, then connect to the Pi’s (fixed) IP address and make an MQTT connection to a mosquitto broker running there.

I learned enough to make this work from: https://blog.adafruit.com/2016/09/13/updated-guide-setting-up-a-raspberry-pi-as-a-wifi-access-point-raspberrypi-raspberry_pi/

Andy

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[Thomas]

Thank you for the clarification Andy, I did indeed miss that part. (having never done that myself actually)

Thomas