Mrk 1010 BLE peripheral sent data(write value to characteristic ) but central can not receive

[conan123452984897]

Here is my code ,with the same code ,my central devices can sent data to peripheral but not the other way around. Any one knows whats the problem?

 if (chatCharacteristic.written()) {
    if (chatCharacteristic.value()) {   // any value other than 0
      byte reading = 0 ;
      chatCharacteristic.readValue(reading);
      char read2= reading;  
      Serial.print(read2);
  }
}
while(Serial.available()>0){
 byte Byte = Serial.read();
chat2Characteristic.writeValue(Byte);

}

[Klaus_K]

Please post the complete code for your peripheral and your central device. Make sure you use code tags properly.

You need three ' at the beginning and end for each sketch in the edit window? When you click on this icon </> you get.

```
type or paste code here
```

This ensures we can get all the source code. When you do this right, there should be a little icon in the top right corner of the sketch window that copies the code when you click on it.

@conan123452984897

,with the same code

Peripheral and central code looks very different, and some functions are not available.

@conan123452984897

if (chatCharacteristic.value()) {   // any value other than 0
      byte reading = 0 ;
      chatCharacteristic.readValue(reading);

I do not know how that should work. If the statement in if() knows the value, why would you need to use readValue.

@conan123452984897

while(Serial.available()>0){
 byte Byte = Serial.read();
chat2Characteristic.writeValue(Byte);

You should not write the characteristics in a tight loop. Characteristics on peripheral devices are not pipes. They are more like variables. Peripherals do not send data you write to a characteristic. They make it available for central devices to read. So, the central device can miss a value when you write too often.