STEVAL-ASTRA1B
The STMicroelectronics STEVAL-ASTRA1B is an Asset-Tracking development kit that embeds the STM32WB5MMG and the STM32WL55JC microcontrollers supporting short and long range connectivity. It is an ultra-low-power platform including environmental and motion sensors and the GNSS module providing outdoor positioning.
About this device
The STMicroelectronics STEVAL-ASTRA1B is an Asset-Tracking development kit that embeds the STM32WB5MMG and the STM32WL55JC microcontrollers supporting short and long range connectivity. It is an ultra-low-power platform including environmental and motion sensors and the GNSS module providing outdoor positioning.
The STEVAL-ASTRA1B supports 8 regional frequency plans and operates as a Class A LoRaWAN device. A payload codec is published in the repository, so uplinks are decoded automatically when you onboard it to The Things Stack.
Key features
- Sensors: accelerometer, gyroscope, pressure, temperature, gps, battery.
- LoRa Alliance certified, verified interoperability with The Things Stack and other LoRaWAN network servers.
- Payload codec included, uplink decoder ready for one-click activation.
- 8 frequency plans supported: AS923, AU915-928, CN779-787, EU863-870, IN865-867, KR920-923, RU864-870, US902-928.
- Battery powered (480 mAh LiPo battery), user replaceable.
Vendor
At a glance
More from STMicroelectronics International NV
NUCLEO-WL55JC1
NUCLEO-WL55JC2
Hardware specifications
| Model ID | steval-astra1b |
| Dimensions | 45 × 60 × 20 mm |
| Weight | 80 g |
| Power | Battery — 480 mAh LiPo battery, replaceable |
| Additional radios | ble, nfc |
Sensors & capabilities
Certifications & compliance
Standards
Network profiles
Capabilities are defined per firmware version and frequency plan, exactly as published in the repository.
Firmware FP-ATR-ASTRA1 v1.1.0
| Frequency plan | MAC | Reg. params | Class | Join | Max EIRP | Certified |
| AS923 | 1.0.3 | RP001-1.0.3-RevA | A | OTAA | 16 dBm | ✓ Yes |
| AU915-928 | 1.0.3 | RP001-1.0.3-RevA | A | OTAA | 30 dBm | — |
| CN779-787 | 1.0.3 | RP001-1.0.3-RevA | A | OTAA | 12 dBm | — |
| EU863-870 | 1.0.3 | RP001-1.0.3-RevA | A | OTAA | 16 dBm | ✓ Yes |
| IN865-867 | 1.0.3 | RP001-1.0.3-RevA | A | OTAA | 30 dBm | ✓ Yes |
| KR920-923 | 1.0.3 | RP001-1.0.3-RevA | A | OTAA | 14 dBm | ✓ Yes |
| RU864-870 | 1.0.3 | RP001-1.0.3-RevA | A | OTAA | 16 dBm | — |
| US902-928 | 1.0.3 | RP001-1.0.3-RevA | A | OTAA | 32 dBm | ✓ Yes |
Frequency plan coverage
Also supported: CN779-787
Live decoder playground
Decode any hex payload client-side with the device's published codec, the exact code The Things Stack runs.
// pick an example or paste a payload, then Decode
Example uplink from The Things Stack
The full JSON message your application receives via MQTT or webhook when this device sends the payload above, raw bytes, decoded fields and radio metadata included.
// decode a payload above to see the full envelope
Codec source
// loading codec…
Add to The Things Stack
Manual setup
Create an application
In The Things Stack console, go to Applications → Create application and pick a unique application ID.
Register an end device
Choose From the LoRaWAN Device Repository and search for “STEVAL-ASTRA1B”. Select your firmware version and frequency plan.
Enter device credentials
Provide the DevEUI, JoinEUI and AppKey printed on the device label or QR code.
Power on & verify uplinks
Within a few minutes you'll see the join request and decoded uplinks in the Live data tab.