Powering an ESPxx on USB from a PC
Posted: Thu Jun 17, 2021 11:56 am
Hi all
I've been playing around with som ESPxx things and also put some into production, but I still have an issue with at least some of them not getting enough power if connected to a PC. Currently, I'm on a macbook pro that's about a year old, so all USB-C and so on. Then a small adapter to connect to USB micro on the ESP. Currently, this is an ESP8266, specifically, ESP-12E DOITING. This works until I enable the radio and then it crashes, probably brownout. WDT kicks in and restarts it and it crashes again and so on. I checked the output from the mac (in macos) and it seems to be only 100mA.
Any idea how to boost this? I'm reading there should be some handshake on USB, but apparently, this never happens. It works well on a "real" PSU, but it'll help out a great deal to debug things with just the power from USB from my PC (or mac, or whatever).
I've been playing around with som ESPxx things and also put some into production, but I still have an issue with at least some of them not getting enough power if connected to a PC. Currently, I'm on a macbook pro that's about a year old, so all USB-C and so on. Then a small adapter to connect to USB micro on the ESP. Currently, this is an ESP8266, specifically, ESP-12E DOITING. This works until I enable the radio and then it crashes, probably brownout. WDT kicks in and restarts it and it crashes again and so on. I checked the output from the mac (in macos) and it seems to be only 100mA.
Any idea how to boost this? I'm reading there should be some handshake on USB, but apparently, this never happens. It works well on a "real" PSU, but it'll help out a great deal to debug things with just the power from USB from my PC (or mac, or whatever).