Thanks for the clarification on the common ground.
My circuit uses a 3.7v battery that is regulated to 3.3v to power the ESP32. The burn board is powered from the V_BUS of a micro USB input, which I presume is also regulated down to 3.3v.
Search found 2 matches
- Mon Aug 09, 2021 8:21 pm
- Forum: Hardware
- Topic: Flash ESP32 on Custom PCB from Tethered Burn Board
- Replies: 2
- Views: 3032
- Sun Aug 08, 2021 4:29 am
- Forum: Hardware
- Topic: Flash ESP32 on Custom PCB from Tethered Burn Board
- Replies: 2
- Views: 3032
Flash ESP32 on Custom PCB from Tethered Burn Board
I have a custom PCB with an ESP32, but I'm using an external burn board ( https://www.amazon.com/gp/product/B07KPHF8XM/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1 ) with the RX, TX, IOO, and EN pins tethered to my PCB via wires to flash my firmware. Below are the relevant portions of my schemat...