[werk_ag]

Not directly, but you can use this small sketch, and then program the TX unit again

Code:

#include <EEPROM.h>

void setup() {
  EEPROM.write(12, 0x00);
}

void loop() {

}

Anyway, normally is not necessary clearing the eeprom on the TX unit. Just do a "factory reset" pressing the push button for 5 seconds on the RX unit, and it should initialize properly no matter how many rain tips are already recorded on the TX eeprom.