53 karma · joined August 20, 2025
1. Either go for the Gowin FPGAs from China. You can get good boards for cheap from Ali.
2. There are FPGAs that now have a FOSS chain. They are very interesting too.
Had a lot of crashes, it often took many many seconds to change between the songs and often getting stuck, the buffering algorithm was nuts and eating a lot of bandwidth.
Everything on a standard Pixel. Full 5G coverage was available.
Alternatives?
The days of manually setting up servers in hyperscaling-environments are long long gone.
Example: Your GitLab CICD needs Runners. They are dynamically requested "somewhere in our cloud somwhere in the world" and then spun up and configures fully automatically. No human touches this stuff anymore.
Was fun seeing IPv6 running for a few days without problems.
1 Core with 512MB RAM combined with Wireguard easily shuffles a few GBit/s.
For accessing my home network I've rented a 1€-VPS that acts as a Wireguard connection hub.
For 433/868/915 they are great.
Encoding basics
Why?
- You can repurpose 2.4GHz Wifi gear opening many doors
- You can easily include volunteers dumping data from HF into a IP sink for telemetry. TTGO offers boards with 2.4GHz LoRa.
- Theoretically you still can add a "low rate" 868MHz/433MHz and a "high rate" 2.4GHz for transmitting pictures and other stuff more quickly.
- BOM friendly. As the balloon might get lost you have to plan a bit for costs.
One of the main reasons of the communities not jumping onto the ship was that it's mostly a one-man-project and most of its Git changes are "Update" "Better Version" "Update" "Cleanup" which makes it basically impossible to track changes.
We evaluated it BT5.x and the performance was not overly satisfying.
Cheapest "general purpose" microcontrollers that have enough features for good developer experience are Puya and WCH.
If you are a seasoned STM32 developer you will get used to them within a day.
Examples:
https://download.py32.org/Datasheet/en/PY32F071_Datasheet_Re...
https://arvidtek.com/wp-content/uploads/2025/06/CH32V006DS0-...
I'm running LTE-only with zero problems for 2 years now without a single coverage gap. Even in the rural parts.
Cannot stand companies stealing stuff and giving nothing back.
Thanks god they hate Copyleft licenses like the plaque.
They are not called Ing Diba anymore.