| I've done a small run of ~100 devices. It was basically the same process as looperhacks: hook stuff up on a breadboard, turn that into a prototype PCB design, iterate on prototypes if there are problems, then just put 100 on the order form instead of 5 when you send it to the manufacturer. You asked in the other comment about flashing and that depends. For me, my project was basically just a motherboard for an ESP32 dev board, which would serve as the logic controller. Since it has a micro-USB port and there were only 100 of them, I just flashed it from my laptop the same as any dev board. For larger scale manufacturing, you can have the flash written in advance, before manufacture or put some exposed contacts on your board that can be reached with pogo pins and write your flash through those pins. You can also outsource all of this to a contract manufacturer like Seeedstudio [0]. As for updates, the ESP32's software has built in OTA functionality that you can configure however you please. My boards are connected with MQTT over WiFi anyway so I added a simple "update now please" command that triggers the OTA. Aside from that you could add a USB port or stream the OTA over bluetooth from a smartphone. [0]: https://www.seeedstudio.com/propagate/ |