Uploading using esptool-ck NOT esptool.py

maxgerhardt · May 25, 2020, 1:07pm

Also it’s pretty bad that the library does an interrupt-processing in this function

lawrie/LightwaveRF/blob/master/LightwaveRF.cpp#L163


      
            lw_tx_pin = tx_pin;
            pinMode(lw_tx_pin,OUTPUT);
          }
          
          
/**
            Set things up to receive LightwaveRF 434Mhz messages using the values specified
          **/
          void lw_rx_setup(byte rx_pin, byte interrupt) {
            lw_rx_pin = rx_pin;
            pinMode(lw_rx_pin,INPUT);
            attachInterrupt(interrupt,lw_process_bits,CHANGE);
          }
          
          
/**
            Set things up to transmit and receive LightwaveRF 434Mhz messages using the values specified
          **/
          boolean lw_setup(byte tx_pin, byte rx_pin, byte interrupt) {
            if(tx_pin == rx_pin) {
              return false;
            }

github.com

lawrie/LightwaveRF/blob/master/LightwaveRF.cpp#L36


      
          
          
static const int lw_bit_delay = 560;
          static const byte lw_repeats = 12; // Number of repeats of message sent
          
          
static long lw_num_invalid_packets[4];
          
          
/**
            Pin change interrupt routine that identifies 1 and 0 LightwaveRF bits
            and constructs a message when a valid packet of data is received.
          **/
          void lw_process_bits() { 
            // Don't process bits when a message is already ready
            if (lw_got_message) return;
            
            byte v = digitalRead(lw_rx_pin); // the current value
            unsigned long curr = micros(); // the current time in microseconds
            
            // Calculate pulse duration in 50 microsecond units
            unsigned int dur = (curr-lw_prev)/50;
            lw_prev = curr;

Which is not marked as ICACHE_RAM_ATTR. All interrupt-processing code must be in IRAM for the ESP8266. See How to fix "ISR not in IRAM" - #2 by maxgerhardt

The library is 8 years old and was probably written with an Arduino Uno in mind rather than an ESP8266.