ESP_igrr wrote:Alternatively, use espefuse.py to set flash voltage to 3.3V. Then the state of GPIO12 will not matter.

how to do this?

the ESP-IDF packet is got from github,the send() is a package of write(), and the example of tcp_perf also use send() to write the file to the server.

I power off the ESP32 for 5 sec. and then power on it. But the ESP32 will always reboot. here is the log: ... rst:0x10 (RTCWDT_RTC_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:2 cmd len -1 ...

I stared at this for a while and can't figure out the logic.... "len = send(connect_socket, recvbuf + (count - to_write), to_write, 0);" Assuming the recvbuf is actually the sendbuf, and assuming you are in some loop sending "to_write" number of bytes each time, I can't understand how "recvbuf + (c...

Maybe it's the program on the PC. Maybe it times out on a recv and closes the file instead of trying another read. Maybe somebody set the recv timeout too low and thought any non ok return meant it was done. Hard to tell from the description of the problem. John A PC use a sockettool creat TCP serv...

Over multiple tests, is it the same "piece" of the received file that differs from the original file? Can we tell where data is being lost? Are you logging the lengths of received data and sent data? I'd like to determine whether the problem is in transmitting data or writing files. For example, if...

kolban wrote:Not really enough to go here (opinion). Is this a TCP or UDP socket? What makes you think that packets get lost? Are you checking the return code from send()?

Compare the file before send and received, it is different.The file has lost some string after received.

Use TCP socket. I use this function "len = send(connect_socket, recvbuf + (count - to_write), to_write, 0);" to send data to PC server.(recvbuf almost 20~30KB) Sometimes, It seems that the function "send" return ok. But the data that PC server got has lost some packet. How could i resolve this issue...

I got this.
thank you!

hi all,
Does the ESP32 need flash MAC address？ and how to flash MAC address?