This part of the project will show the wiring diagram for the LoPy tracker.
The tracker is built around the LoPy of PyCom. It’s a MicroPython programmable ESP32 with LoRa transceiver on board. Although one can connect to it using the device’s AP mode a serial to USB FT232R interface was used. This also powers the unit through the USB 5V. The LoPy has a 3.3V regulator on board capable of delivering 1.2A, well enough for the peripherals we will be adding.
Communication to the display uses I2C and the GPS module uses a UART port. During installation the FT232R was also used to connect and configure the GPS.
Most components were obtained through Banggood:
Some pictures for further inspiration
In full operation
Results as shown on TTN Mapper
Projects by Keptenkurk 
Do you have code for the SSD1306 part? I’m having trouble getting mine to work with my Lopy4
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You can find it on GitHub https://github.com/keptenkurk/pyTTNmap?files=1 Took me a while to figure out that I needed to use frozen bytecode to have it all fit in the ESP. Also a regular call to the garbage collector solved a lot of weird problems.
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