-
InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
if you have a board with a lot of UARTs and a way to connect your targets programming-UART to them, Expressif provides a C implementation of the bootloader protocol suitable for running on embedded devices here. This is basically the same functionality esptool.py provides in C. That repo's example directory provides code running on other ESP's, RaspPi's and STM32. You would need a bit of customizing. If you want to do this via USB, the board doing the flashing needs USB host (e.g. ESP S3)
for smaller volumes: we just flashed ~4000 Badges for the MCH2022 hacker camp using esptools.py on a PC based setup and cheap USB Hubs. The scripts for that setup are here. They are very specific to the Badge (and a bit ad hoc) but should give you a good idea of the process.