The AP mode is very useful. My app comes up and users connect to it via wifi using a websocket, and received streamed data.

Along the same lines, I'm planning an ESP32 project that will stream data through wifi to a web client using web sockets, but also I want to monitor BLE to detect that a remote button has been pressed. If I understand the problem correctly, the issue is that the ESP32 uses the same radio and antenna...

Hi, I'm working on a circuit that will use an ESP32-WROOM-32U and I'm thinking that an external watchdog is a good idea. However, I'm aware that the ESP32 starts very slowly, so I was looking at the TSP3823 which has a startup delay of 1.6 seconds after VDD exceeds 1.1V. Is this sufficient? Is there...

mikemoy wrote: ↑

Sun Dec 08, 2019 5:43 am

What I would do, its take your scope or meter and make sure that GPIO0 is bulled up to 3.3v when you plug it in. If its low at power up it will be in flash mode.

I applied power and I did find 3.3V at pin 25 (IO0) and also, I checked pin 12 and it seems to be pulled low.

Thanks very much, I'll check that today. Sadly, the board does not break out GPIO0 but I'll try to check the chip directly.

As a followup to this topic: https://www.esp32.com/viewtopic.php?f=2&t=13272 I still can't make this board boot at power up. The theory that has been suggested is that a current inrush causes the voltage to drop, interrupting the boot. Using Mongoose, it seems that the board boots with Wifi and BLE ...

I have a dev board with an ESP32-Wroom (the one with the cfl connector) and a CP2120N USB to UART chip. The board has diodes to switch from being powered via USB or via Vin, but I don't have a schematic. When I flash the board, or when I plug it into my MacBook's USB port when a terminal emulator is...

I have used C++ successfully on a bunch of firmware projects in devices car less capable than the ESP32. As Susan said I do try to avoid dynamic memory allocation, however I often find that when I do use it, I just reuse the allocation and rarely have a need to free, thus avoiding heap fragmentation...

Sorry to bump an old post, I'm not sure if that's appropriate or not, but I'm looking for the same thing. I need an ESP32 WROOM board with an accelerometer & gyro on it, ideally with mounting holes. If anyone knows of one I would appreciate a pointer.

Thanks!