Spreading factors, airtime, and the configuration on AfriOrbit's own edge device
LoRa for Satellite IoT
How LoRa trades data rate for range, what that costs in airtime, and how the SX1278 on the AfriOrbit IoT Edge Device is actually configured.
Intermediate3 h4 lessons1 simulatorHardware requiredlorasx1278rfiotesp32
What you will be able to do
- Predict airtime from spreading factor, bandwidth, coding rate and payload
- Explain why a longer-range link carries less data per day, quantitatively
- Read and modify the real LoRa configuration on the AfriOrbit edge device
Syllabus
Module 1
The LoRa physical layer
Chirp spread spectrum, and the four knobs that decide everything.
Module 2
The AfriOrbit IoT Edge Device
The actual board: what is on it, how it is wired, and how the firmware configures it.
Assessment
LoRa configuration check
Graded. All figures come from AfriOrbit's own project documentation.
5 questions, graded once you are signed in.
Source material
AfriOrbit SDR-IOT-project: Software/IoTEdgeDevice/LoraV1 firmware, include/Comms/sx1278_pinouts.md, and Fab Files BOM. Plus SX1276/77/78/79 datasheet.