Last update: 15/1 2020
In collaboration with Emil Schier Christiansen and Engineers Without Borders Denmark, I am developing an
open-source IoT device for monitoring water pumps located in rural villages of Sierra Leone. Collected data
can be utilized to determine if a breakdown of a hand pump has occurred.
The device uses the GSM network to send collected data to a server (server not yet implemented).
Unfortunately, not all areas of Sierra Leone is covered by the GSM network. Instead, LoRa communication can
be used to transfer data from devices in locations without GSM coverage to a device in a location with GSM
coverage.
| Power consumption | |
| Active state: | 4,2mA |
| Passive state: | 43µA |
| LoRa Tx: | Up to 101mA |
| LoRa Rx: | 17,5mA |
| GSM Tx: | Up to 2A |
Adafruit RFM95 LoRa module
SIM800L GSM module
Driven by solar cells
Possibility to use a super capacitor (5F) to store energy (+85µA current consumption no matter devices state)
Download
The Github pages with the source code, PCB design and BOM will be released when the initial development has finished.
