Wroom32/32D/32U uses 3.3v flash Wrover/wrover-I uses 1.8v flash Wrover-B/IB uses 3.3v flash Pico-d4 uses 3.3v flash D2WD uses 1.8v flash Know your parts Many thanks for the hints. You are right, I need to think about if I should burn efuse to use 1.8v, as the burning action cannot be reverted :D

Your boot mode is 3f indicating you pulled up gpio12 which is setting the flash voltage to 1.8v and wroom32 uses 3.3v flash. Set the flash voltage via efuse or remove the pullup. thanks for pointing it out. I have also one wrover kit board on which flashing is working fine. While resetting I can se...

The only thing that should exit download mode is a chip reset. immediately after work I tried your suggestion. Still the same :( Basically after I see the following: rst:0x10 (RTCWDT_RTC_RESET),boot:0x3f (SPI_FAST_FLASH_BOOT) flash read err, 1000 ets_main.c 371 ets Jun 8 2016 00:22:57 rst:0x10 (RTC...

thanks for the quick reply, I did not try that....

I tried ctrl+c to terminate "make monitor" though, then make flash. It did not work.

So ctrl + ] will gracefully exit "make monitor" without breaking the download mode?

Yes I know, there are tons of similar posts, and I do read them through, but cannot get my problem solved :( So basically I made a custom board based on ESP32 WROOM module. Then I used "make monitor" to monitor the serial port output. By toggling the GPIO0 button I am able to see ESP32 is entering d...

suppose A2DP source is playing one audio, i.e. A2DP is now in started state. Now I want to stop the current playing and play another audio immediately. Should I first stop A2DP current playing, move it to idle state, then do the whole start procedure again. Or I can directly send ESP_A2D_MEDIA_CTRL_...

Thanks for the quick and detailed reply. I will follow the steps and check.

I am using A2DP source to send audio to headset. From the log from BT Stack I can see there is this error from time to time printed out: BT: ERROR btc_media_aa_prep_sbc_2_send no buffer TxCnt 3 I digged into BT stack and found out the code is like this: while (nb_frame) { if (NULL == (p_buf = osi_ma...

I use ESP32 as A2DP SRC, after I press button 1 , it will do the discovery, find one A2DP sink and create the connection. If I press button 2 , it will first disconnect the previous connection and try to connect 2nd A2DP sink. In this way I can choose a certain Sink to send certain audio. The implem...

I would like ESP32 used as bluetooth A2DP SRC, and let it connected with multiple sinks. Can I create multiple connections at the same time with different audio devices? I don't need to broadcast to all devices at the same time, but rather select one device to receive audio, then switch to another d...