Hi everyone,

I’m currently working on a low-power RISC-V project and have a few questions about the ECB32 dev board and its supporting solutions. Would really appreciate any insights from folks who are familiar with this hardware!

1. **SBC Core Accessibility**: Does the ECB32 (T527) dev board support custom access to its low-power RISC-V core? I have a customization requirement, but only need a small batch of units initially. Does the manufacturer accept small-volume custom orders?

2. **Test Board Availability**: Is there an official test board for ECB32 available for purchase or application right now? For solutions that require built-in ESP32, are EoRa-S3-400TB and EoRa-S3-900TB the recommended models? What are the main differences between these two?

3. **Accessories**: Does the ECB32 dev board have an official accessory kit (like debuggers, expansion boards, etc.), or do I need to source those separately?

4. **GPS Antenna Selection**: If I want to add GPS functionality to this dev board, are there any recommended antenna models? Are there reference documents for antenna parameters and wiring instructions?

Thanks in advance for any help!