Sim7020
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| Project Sim7020 | |
|---|---|
| |
| SIM7020 NB-IOT modem | |
| Status | In progress |
| Contact | bertrik |
| Last Update | 2021-01-23 |
What
This page is about the SIM7020 NB-IOT module.
I plan to experiment with this kind of network connectivity for perhaps a bat activity monitor or air quality monitoring.
Update: this escalated quickly ... the NB-IOT stuff at t-mobile already seems dead: The t-mobile website has an outdated certificate, otherwise seems down (error 503).
Hardware
I wired it up like this:
| SIM7020 | USB serial | Remark |
|---|---|---|
| G | nc | looped to SIM7020-K |
| R | TXD | |
| T | RXD | |
| K | nc | looped to SIM7020-G |
| V | 3V3 | |
| G | GND | |
| S | DTR |
References
I followed roughly this guide:
- Ordered a SIM7020 and a starter kit, see https://www.hackster.io/voske65/arduino-nb-iot-with-sim7020-and-t-mobile-027f8f
- Account page: https://portal.iot.t-mobile.nl/auth/login