Most of our MQTT-clients uses the identical base module consisting of

• an ESP32 devkit V1 (the development board by the ESP32 producer Expressif) without soldered pins!
• 2 rows of connectors (single Row Straight FEMALE PIN HEADER 2.54MM PITCH pin long 12MM) for the ESP board
• a display adapter board that also contains 2 PCB buttons accessible through the front (interrupt power NC and start Wifi Manager NO)
• a display, usually a 240*240 1.3″ TFT (ST7789 driver). We are currently preparing an alternative version using a 2.0″ TFT SPI with the same driver.
• 3D-printed front, base, cover. The back plane is specific for the type of client
• All screws are 2.2mm diameter self-tapping.

Links are for example only.

The clients can easily be installed in racks constructed from cheap 2020 Al extruder parts. The fronts are size-compatible with standard 19″ unit standards. and fastened by 8mm M5 screws with slide nuts.

Instead of the printed circuit board, the few connections can be easily soldered with wires ….

This version did not contain the two buttons and the power supply connector yet …..