This device scans for visible bluetooth and wifi devices and then transmits the device count over NBIoT to a backend server.
Tested on a ESP-WROOM-32D + EE-NBIoT-01 rat's nest ;)
- VCC 3.3V
- EN to VCC via 10k pull-up
- IO0 to GND via boot switch (enable programming mode by grounding IO0 before power-on)
- GND
- IO16 to EE-NBIoT-01 RXD
- IO17 to EE-NBIoT-01 TXD
- RXD0 a) to FTDI TX and b) to GND via 10k pull-down
- TXD0 to FTDI RX
- Use common ground for ESP-WROOM-32D, EE-NBIoT-01 and FTDI.
- Leave FTDI VCC pin unconnected
