void send_deviceData(){
//static const char *buff="test";
char buff[100]={"0"};
sprintf(buff,"{'DeviceId':%s,'DeviceName':%s,'Mode':%d,'Power':%d,"
"'ProNum':%s}",deviceData.DeviceId,deviceData.DeviceName,
deviceData.Mode,deviceData.Power,deviceData.ProNum);

while(1){
int err = send(sock ...

thank you for you reply，this is my carelessness，my problem has been solved。

I have designed a 4.2-inch E-paper(ink screen) driver board, and the control is ESP-WROOM-32. There is no problem in blink example by IDF-included. When I modify the driver from the official of the screen , it is unable to refresh . Because this is the first time I use ESP32, I suspect that my SPI ...

{
"configurations": [
{
"name": "Win32",
"includePath": [
"${config:idf.espIdfPathWin}/components/**",
"${workspaceFolder}/**",
"D:/blink/components/e-paper/include",
"D:/esp-tool/.espressif/tools/xtensa-esp32-elf/esp-2020r3-8.4.0/xtensa-esp32-elf/xtensa-esp32-elf/sys-include ...