User Manual Q&AAnswer
Nov 06, 2025 - 09:22 AM
According to the u-blox SARA Migration User Guide, migrating between different SARA modules can be done by following these guidelines:
1. **Overview of SARA Modules Compatibility:**
- The SARA modules share a common form factor (26.0 x 16.0 mm, 96-pin LGA) and have compatible pin assignments.
- The modules can be mounted on a single application PCB using the same layout.
2. **Compatible SARA Module Series:**
- SARA-R41 series: LTE Cat M1, LTE Cat NB1, and 2G technologies.
- SARA-R42 series: LTE Cat M1, LTE Cat NB2, and 2G technologies.
- SARA-R5 series: LTE Cat M1 and LTE Cat NB2 technologies.
- SARA-N2 series: LTE Cat NB1 technology.
- SARA-N3 series: LTE Cat NB2 technology.
- SARA-G3 series: 2G technology.
- SARA-G4 series: 2G technology.
- SARA-U2 series: 3G and 2G technologies.
3. **Nested Design Solution:**
- The "nested design" solution allows any TOBY, LISA, LARA, or SARA module to be mounted on the same space of a single "nested" application board.
- Guidelines for implementing a nested application board are provided in the user guide.
4. **Pin-Out Comparison:**
- The user guide provides a detailed pin-out comparison between different SARA modules, including SARA-R4, SARA-R5, SARA-N2, SARA-N3, SARA-G3, SARA-G4, and SARA-U2 series.
- The comparison includes details on power supply, UART interfaces, GPIOs, SIM card interfaces, antenna connections, and more.
5. **Schematic Integration:**
- The user guide includes a schematic for integrating SARA modules into a system, detailing the VCC supply, UART serial interfaces, and module connections.
By following the guidelines and pin-out comparisons provided in the user guide, users can successfully migrate between different SARA modules while ensuring compatibility and proper integration into their IoT applications.
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