Initial multiplatform support

Config.h

@@ -4,20 +4,30 @@
 	#define CONFIG_H
 
 	#define MAJ_VERS  0x01
-	#define MIN_VERS  0x12
+	#define MIN_VERS  0x13
+
+	#define PLATFORM_AVR   0x90
+    #define PLATFORM_ESP32 0x80
 
 	#define MCU_1284P 0x91
 	#define MCU_2560  0x92
+	#define MCU_ESP32 0x81
 
 	#define MODE_HOST 0x11
 	#define MODE_TNC  0x12
 
 	#if defined(__AVR_ATmega1284P__)
+		#define PLATFORM PLATFORM_AVR
 		#define MCU_VARIANT MCU_1284P
 		#warning "Firmware is being compiled for atmega1284p based boards"
 	#elif defined(__AVR_ATmega2560__)
+		#define PLATFORM PLATFORM_AVR
 		#define MCU_VARIANT MCU_2560
 		#warning "Firmware is being compiled for atmega2560 based boards"
+	#elif defined(ESP32)
+		#define PLATFORM PLATFORM_ESP32
+		#define MCU_VARIANT MCU_ESP32
+		#warning "Firmware is being compiled for ESP32 based boards"
 	#else
 		#error "The firmware cannot be compiled for the selected MCU variant"
 	#endif
@@ -38,29 +48,40 @@
 		const int pin_led_rx = 12;
 		const int pin_led_tx = 13;
 
-		// TODO: Reset
 		#define CONFIG_UART_BUFFER_SIZE 6144
 		#define CONFIG_QUEUE_SIZE 6144
 		#define CONFIG_QUEUE_MAX_LENGTH 250
 
 		#define EEPROM_SIZE 4096
 		#define EEPROM_OFFSET EEPROM_SIZE-EEPROM_RESERVED
-	#endif
 	
-	#if MCU_VARIANT == MCU_2560
+	#elif MCU_VARIANT == MCU_2560
 		const int pin_cs = 10;
 		const int pin_reset = 9;
 		const int pin_dio = 2;
 		const int pin_led_rx = 12;
 		const int pin_led_tx = 13;
 
-		// TODO: Reset
 		#define CONFIG_UART_BUFFER_SIZE 2048
 		#define CONFIG_QUEUE_SIZE 2048
-		#define CONFIG_QUEUE_MAX_LENGTH 250
+		#define CONFIG_QUEUE_MAX_LENGTH 80
 
 		#define EEPROM_SIZE 4096
 		#define EEPROM_OFFSET EEPROM_SIZE-EEPROM_RESERVED
+
+	#elif MCU_VARIANT == MCU_ESP32
+		const int pin_cs = 18;
+		const int pin_reset = 23;
+		const int pin_dio = 26;
+		const int pin_led_rx = 2;
+		const int pin_led_tx = 4;
+
+		#define CONFIG_UART_BUFFER_SIZE 6144
+		#define CONFIG_QUEUE_SIZE 6144
+		#define CONFIG_QUEUE_MAX_LENGTH 250
+
+		#define EEPROM_SIZE 1024
+		#define EEPROM_OFFSET EEPROM_SIZE-EEPROM_RESERVED
 	#endif
 
 	#define eeprom_addr(a) (a+EEPROM_OFFSET)

Framing.h

@@ -27,6 +27,8 @@
 	#define CMD_BLINK		0x30
 	#define CMD_RANDOM		0x40
 
+	#define CMD_PLATFORM    0x48
+	#define CMD_MCU         0x49
 	#define CMD_FW_VERSION  0x50
 	#define CMD_ROM_READ	0x51
 	#define CMD_ROM_WRITE	0x52
@@ -34,6 +36,9 @@
 	#define CMD_CONF_DELETE 0x54
 	#define CMD_UNLOCK_ROM	0x59
 	#define ROM_UNLOCK_BYTE 0xF8
+	#define CMD_RESET       0x55
+	#define CMD_RESET_BYTE  0xF8
+
 
 	#define DETECT_REQ	 	0x73
 	#define DETECT_RESP		0x46

LoRa.cpp

@@ -449,6 +449,8 @@ long LoRaClass::getSignalBandwidth()
     case 8: return 250E3; 
     case 9: return 500E3; 
   }
+  
+  return 0;
 }
 
 void LoRaClass::handleLowDataRate(){

Makefile

@@ -1,6 +1,29 @@
+prep:
+	arduino-cli core update-index --config-file arduino-cli.yaml
+	arduino-cli core install unsignedio:avr
 
 firmware:
 	arduino-cli compile --fqbn unsignedio:avr:rnode
 
+release:
+	arduino-cli compile --fqbn unsignedio:avr:rnode -e
+	cp build/unsignedio.avr.rnode/RNode_Firmware.ino.hex Precompiled/rnode_firmware_latest.hex
+	rm -r build
+
 upload:
 	arduino-cli upload -p /dev/ttyUSB0 --fqbn unsignedio:avr:rnode
+
+prep-tbeam:
+	arduino-cli core update-index --config-file arduino-cli.yaml
+	arduino-cli core install esp32:esp32
+
+firmware-tbeam:
+	arduino-cli compile --fqbn esp32:esp32:t-beam
+
+upload-tbeam:
+	arduino-cli upload -p /dev/ttyUSB0 --fqbn esp32:esp32:t-beam
+
+release-tbeam:
+	arduino-cli compile --fqbn esp32:esp32:t-beam -e
+	cp build/esp32.esp32.t-beam/RNode_Firmware.ino.bin Precompiled/rnode_firmware_latest_tbeam.bin
+	rm -r build

RNode_Firmware.ino

@@ -22,6 +22,12 @@ volatile bool serial_buffering = false;
 char sbuf[128];
 
 void setup() {
+  #if MCU_VARIANT == MCU_ESP32
+    delay(1500);
+    EEPROM.begin(EEPROM_SIZE);
+    Serial.setRxBufferSize(CONFIG_UART_BUFFER_SIZE);
+  #endif
+
   // Seed the PRNG
   randomSeed(analogRead(0));
 
@@ -54,6 +60,12 @@ void setup() {
   // pins for the LoRa module
   LoRa.setPins(pin_cs, pin_reset, pin_dio);
 
+  #if MCU_VARIANT == MCU_ESP32
+    radio_locked  = true;
+    radio_online  = false;
+    hw_ready      = false;
+  #endif
+
   // Validate board health, EEPROM and config
   validateStatus();
 }
@@ -76,6 +88,7 @@ bool startRadio() {
         // serial port and with the onboard LEDs
         kiss_indicate_error(ERROR_INITRADIO);
         led_indicate_error(0);
+        return false;
       } else {
         radio_online = true;
 
@@ -86,13 +99,17 @@ bool startRadio() {
         getFrequency();
 
         LoRa.enableCrc();
-        LoRa.onReceive(receiveCallback);
+
+        #if MCU_VARIANT != MCU_ESP32
+          LoRa.onReceive(receive_callback);
+        #endif
 
         lora_receive();
 
         // Flash an info pattern to indicate
         // that the radio is now on
         led_indicate_info(3);
+        return true;
       }
 
     } else {
@@ -100,10 +117,12 @@ bool startRadio() {
       // that the radio was locked, and thus
       // not started
       led_indicate_warning(3);
+      return false;
     }
   } else {
     // If radio is already on, we silently
     // ignore the request.
+    return true;
   }
 }
 
@@ -120,7 +139,7 @@ void update_radio_lock() {
   }
 }
 
-void receiveCallback(int packet_size) {
+void receive_callback(int packet_size) {
   if (!promisc) {
     // The standard operating mode allows large
     // packets with a payload up to 500 bytes,
@@ -197,7 +216,7 @@ void receiveCallback(int packet_size) {
     }  
   } else {
     // In promiscuous mode, raw packets are
-    // output directly over to the host
+    // output directly to the host
     read_len = 0;
     last_rssi = LoRa.packetRssi();
     last_snr_raw = LoRa.packetSnrRaw();
@@ -232,7 +251,13 @@ void flushQueue(void) {
     queue_flushing = true;
 
     size_t processed = 0;
+
+    #if MCU_VARIANT == MCU_ESP32
+    while (!fifo16_isempty(&packet_starts)) {
+    #else
     while (!fifo16_isempty_locked(&packet_starts)) {
+    #endif
+
       size_t start = fifo16_pop(&packet_starts);
       size_t length = fifo16_pop(&packet_lengths);
 
@@ -497,6 +522,10 @@ void serialCallback(uint8_t sbyte) {
       if (sbyte == ROM_UNLOCK_BYTE) {
         unlock_rom();
       }
+    } else if (command == CMD_RESET) {
+      if (sbyte == CMD_RESET_BYTE) {
+        hard_reset();
+      }
     } else if (command == CMD_ROM_READ) {
       kiss_dump_eeprom();
     } else if (command == CMD_ROM_WRITE) {
@@ -516,6 +545,10 @@ void serialCallback(uint8_t sbyte) {
         }
     } else if (command == CMD_FW_VERSION) {
       kiss_indicate_version();
+    } else if (command == CMD_PLATFORM) {
+      kiss_indicate_platform();
+    } else if (command == CMD_MCU) {
+      kiss_indicate_mcu();
     } else if (command == CMD_CONF_SAVE) {
       eeprom_conf_save();
     } else if (command == CMD_CONF_DELETE) {
@@ -562,18 +595,31 @@ void checkModemStatus() {
 }
 
 void validateStatus() {
-  if (OPTIBOOT_MCUSR & (1<<PORF)) {
+  #if MCU_VARIANT == MCU_1284P || MCU_VARIANT == MCU_2560
+      uint8_t boot_flags = OPTIBOOT_MCUSR;
+      uint8_t F_POR = PORF;
+      uint8_t F_BOR = BORF;
+      uint8_t F_WDR = WDRF;
+  #elif MCU_VARIANT == MCU_ESP32
+      // TODO: Get ESP32 boot flags
+      uint8_t boot_flags = 0x02;
+      uint8_t F_POR = 0x00;
+      uint8_t F_BOR = 0x00;
+      uint8_t F_WDR = 0x01;
+  #endif
+
+  if (boot_flags & (1<<F_POR)) {
     boot_vector = START_FROM_POWERON;
-  } else if (OPTIBOOT_MCUSR & (1<<BORF)) {
+  } else if (boot_flags & (1<<F_BOR)) {
     boot_vector = START_FROM_BROWNOUT;
-  } else if (OPTIBOOT_MCUSR & (1<<WDRF)) {
+  } else if (boot_flags & (1<<F_WDR)) {
     boot_vector = START_FROM_BOOTLOADER;
   } else {
       Serial.write("Error, indeterminate boot vector\r\n");
       led_indicate_boot_error();
   }
 
-  if (boot_vector == START_FROM_BOOTLOADER) {
+  if (boot_vector == START_FROM_BOOTLOADER || boot_vector == START_FROM_POWERON) {
     if (eeprom_lock_set()) {
       if (eeprom_product_valid() && eeprom_model_valid() && eeprom_hwrev_valid()) {
         if (eeprom_checksum_valid()) {
@@ -602,6 +648,13 @@ void loop() {
   if (radio_online) {
     checkModemStatus();
 
+    #if MCU_VARIANT == MCU_ESP32
+      int packet_size = LoRa.parsePacket();
+      if (packet_size) {
+        receive_callback(packet_size);
+      }
+    #endif
+
     if (queue_height > 0) {
       if (!dcd_waiting) updateModemStatus();
 
@@ -630,14 +683,26 @@ void loop() {
     }
   }
 
+  #if MCU_VARIANT == MCU_ESP32
+    buffer_serial();
+  #endif
+
+  #if MCU_VARIANT != MCU_ESP32
     if (!fifo_isempty_locked(&serialFIFO)) serial_poll();
+  #else
+    if (!fifo_isempty(&serialFIFO)) serial_poll();
+  #endif
 }
 
 volatile bool serial_polling = false;
 void serial_poll() {
   serial_polling = true;
 
+  #if MCU_VARIANT != MCU_ESP32
   while (!fifo_isempty_locked(&serialFIFO)) {
+  #else
+  while (!fifo_isempty(&serialFIFO)) {
+  #endif
     char sbyte = fifo_pop(&serialFIFO);
     serialCallback(sbyte);
   }
@@ -645,6 +710,7 @@ void serial_poll() {
   serial_polling = false;
 }
 
+
 #define MAX_CYCLES 20
 void buffer_serial() {
   if (!serial_buffering) {
@@ -654,9 +720,15 @@ void buffer_serial() {
     while (c < MAX_CYCLES && Serial.available()) {
       c++;
 
+      #if MCU_VARIANT != MCU_ESP32
         if (!fifo_isfull_locked(&serialFIFO)) {
           fifo_push_locked(&serialFIFO, Serial.read());
         }
+      #else
+        if (!fifo_isfull(&serialFIFO)) {
+          fifo_push(&serialFIFO, Serial.read());
+        }
+      #endif
     }
 
     serial_buffering = false;
@@ -664,6 +736,7 @@ void buffer_serial() {
 }
 
 void serial_interrupt_init() {
+  #if MCU_VARIANT == MCU_1284P
       TCCR3A = 0;
       TCCR3B = _BV(CS10) |
                _BV(WGM33)|
@@ -673,8 +746,29 @@ void serial_interrupt_init() {
       ICR3 = 16000;
 
       TIMSK3 = _BV(ICIE3);
+
+  #elif MCU_VARIANT == MCU_2560
+      // TODO: This should probably be updated for
+      // atmega2560 support. Might be source of
+      // reported issues from snh.
+      TCCR3A = 0;
+      TCCR3B = _BV(CS10) |
+               _BV(WGM33)|
+               _BV(WGM32);
+
+      // Buffer incoming frames every 1ms
+      ICR3 = 16000;
+
+      TIMSK3 = _BV(ICIE3);
+
+  #elif MCU_VARIANT == MCU_ESP32
+      // No interrupt-based polling on ESP32
+  #endif
+
 }
 
+#if MCU_VARIANT == MCU_1284P || MCU_VARIANT == MCU_2560
   ISR(TIMER3_CAPT_vect) {
     buffer_serial();
   }
+#endif

ROM.h

@@ -4,8 +4,13 @@
 	#define CHECKSUMMED_SIZE 0x0B
 
 	#define PRODUCT_RNODE 0x03
+	#define PRODUCT_HMBRW 0xF0
+	#define PRODUCT_TBEAM 0xE0
 	#define MODEL_A4 0xA4
 	#define MODEL_A9 0xA9
+	#define MODEL_E4 0xE4
+	#define MODEL_E9 0xE9
+	#define MODEL_FF 0xFF
 
 	#define ADDR_PRODUCT   0x00
 	#define ADDR_MODEL     0x01

Utilities.h

@@ -1,23 +1,52 @@
 #include <EEPROM.h>
 #include <stddef.h>
-#include <util/atomic.h>
 #include "LoRa.h"
 #include "ROM.h"
 #include "Config.h"
 #include "Framing.h"
 #include "MD5.h"
 
+#if MCU_VARIANT == MCU_1284P || MCU_VARIANT == MCU_2560
+	#include <avr/wdt.h>
+	#include <util/atomic.h>
+#elif MCU_VARIANT == MCU_ESP32
+	// TODO: Hard reset on ESP32
+#endif
+
 uint8_t boot_vector = 0x00;
+
+#if MCU_VARIANT == MCU_1284P || MCU_VARIANT == MCU_2560
 	uint8_t OPTIBOOT_MCUSR __attribute__ ((section(".noinit")));
 	void resetFlagsInit(void) __attribute__ ((naked)) __attribute__ ((used)) __attribute__ ((section (".init0")));
 	void resetFlagsInit(void) {
 	    __asm__ __volatile__ ("sts %0, r2\n" : "=m" (OPTIBOOT_MCUSR) :);
 	}
+#elif MCU_VARIANT == MCU_ESP32
+	// TODO: Get ESP32 boot flags
+#endif
 
+#if MCU_VARIANT == MCU_1284P || MCU_VARIANT == MCU_2560
 	void led_rx_on()  { digitalWrite(pin_led_rx, HIGH); }
 	void led_rx_off() {	digitalWrite(pin_led_rx, LOW); }
 	void led_tx_on()  { digitalWrite(pin_led_tx, HIGH); }
 	void led_tx_off() { digitalWrite(pin_led_tx, LOW); }
+#elif MCU_VARIANT == MCU_ESP32
+	void led_rx_on()  { digitalWrite(pin_led_rx, LOW); }
+	void led_rx_off() {	digitalWrite(pin_led_rx, HIGH); }
+	void led_tx_on()  { digitalWrite(pin_led_tx, LOW); }
+	void led_tx_off() { digitalWrite(pin_led_tx, HIGH); }
+#endif
+
+void hard_reset(void) {
+	#if MCU_VARIANT == MCU_1284P || MCU_VARIANT == MCU_2560
+		wdt_enable(WDTO_15MS);
+		while(true) {
+			led_tx_on(); led_rx_off();
+		}
+	#elif MCU_VARIANT == MCU_ESP32
+		ESP.restart();
+	#endif
+}
 
 void led_indicate_error(int cycles) {
 	bool forever = (cycles == 0) ? true : false;
@@ -31,8 +60,8 @@ void led_indicate_error(int cycles) {
         delay(100);
         if (!forever) cycles--;
     }
-    digitalWrite(pin_led_rx, LOW);
+    led_rx_off();
-    digitalWrite(pin_led_tx, LOW);
+    led_tx_off();
 }
 
 void led_indicate_boot_error() {
@@ -51,34 +80,64 @@ void led_indicate_warning(int cycles) {
 	cycles = forever ? 1 : cycles;
 	digitalWrite(pin_led_tx, HIGH);
 	while(cycles > 0) {
-        digitalWrite(pin_led_tx, LOW);
+        led_tx_off();
         delay(100);
-        digitalWrite(pin_led_tx, HIGH);
+        led_tx_on();
         delay(100);
         if (!forever) cycles--;
     }
-    digitalWrite(pin_led_tx, LOW);
+   led_tx_off();
 }
 
+#if MCU_VARIANT == MCU_1284P || MCU_VARIANT == MCU_2560
 	void led_indicate_info(int cycles) {
 		bool forever = (cycles == 0) ? true : false;
 		cycles = forever ? 1 : cycles;
 		while(cycles > 0) {
-        digitalWrite(pin_led_rx, LOW);
+	    led_rx_off();
 	    delay(100);
-        digitalWrite(pin_led_rx, HIGH);
+	    led_rx_on();
 	    delay(100);
 	    if (!forever) cycles--;
 	  }
-    digitalWrite(pin_led_rx, LOW);
+	  led_rx_off();
 	}
+#elif MCU_VARIANT == MCU_ESP32
+	void led_indicate_info(int cycles) {
+		bool forever = (cycles == 0) ? true : false;
+		cycles = forever ? 1 : cycles;
+		while(cycles > 0) {
+	    led_tx_off();
+	    delay(100);
+	    led_tx_on();
+	    delay(100);
+	    if (!forever) cycles--;
+	  }
+	  led_tx_off();
+	}
+#endif
 
+
+unsigned long led_standby_ticks = 0;
+#if MCU_VARIANT == MCU_1284P || MCU_VARIANT == MCU_2560
 	uint8_t led_standby_min = 1;
 	uint8_t led_standby_max = 40;
+	unsigned long led_standby_wait = 11000;
+#elif MCU_VARIANT == MCU_ESP32
+	uint8_t led_standby_min = 200;
+	uint8_t led_standby_max = 255;
+	uint8_t led_notready_min = 0;
+	uint8_t led_notready_max = 255;
+	uint8_t led_notready_value = led_notready_min;
+	int8_t  led_notready_direction = 0;
+	unsigned long led_notready_ticks = 0;
+	unsigned long led_standby_wait = 4000;
+	unsigned long led_notready_wait = 150;
+#endif
 uint8_t led_standby_value = led_standby_min;
 int8_t  led_standby_direction = 0;
-unsigned long led_standby_ticks = 0;
+
-unsigned long led_standby_wait = 11000;
+#if MCU_VARIANT == MCU_1284P || MCU_VARIANT == MCU_2560
 	void led_indicate_standby() {
 		led_standby_ticks++;
 		if (led_standby_ticks > led_standby_wait) {
@@ -90,10 +149,28 @@ void led_indicate_standby() {
 			}
 			led_standby_value += led_standby_direction;
 			analogWrite(pin_led_rx, led_standby_value);
-		digitalWrite(pin_led_tx, 0);
+			led_tx_off();
 		}
 	}
+#elif MCU_VARIANT == MCU_ESP32
+	void led_indicate_standby() {
+		led_standby_ticks++;
+		if (led_standby_ticks > led_standby_wait) {
+			led_standby_ticks = 0;
+			if (led_standby_value <= led_standby_min) {
+				led_standby_direction = 1;
+			} else if (led_standby_value >= led_standby_max) {
+				led_standby_direction = -1;
+			}
+			led_standby_value += led_standby_direction;
+			analogWrite(pin_led_tx, led_standby_value);
+			led_rx_off();
 
+		}
+	}
+#endif
+
+#if MCU_VARIANT == MCU_1284P || MCU_VARIANT == MCU_2560
 	void led_indicate_not_ready() {
 		led_standby_ticks++;
 		if (led_standby_ticks > led_standby_wait) {
@@ -105,9 +182,29 @@ void led_indicate_not_ready() {
 			}
 			led_standby_value += led_standby_direction;
 			analogWrite(pin_led_tx, led_standby_value);
-		digitalWrite(pin_led_rx, 0);
+			led_rx_off();
 		}
 	}
+#elif MCU_VARIANT == MCU_ESP32
+	void led_indicate_not_ready() {
+		led_notready_ticks++;
+		if (led_notready_ticks > led_notready_wait) {
+			led_notready_ticks = 0;
+			if (led_notready_value <= led_notready_min) {
+				led_notready_direction = 1;
+			} else if (led_notready_value >= led_notready_max) {
+				led_notready_direction = -1;
+			}
+			led_notready_value += led_notready_direction;
+			if (led_notready_value > 128) {
+				led_tx_on();
+			} else {
+				led_tx_off();
+			}
+			led_rx_off();
+		}
+	}
+#endif
 
 void escapedSerialWrite(uint8_t byte) {
 	if (byte == FEND) { Serial.write(FESC); byte = TFEND; }
@@ -266,6 +363,20 @@ void kiss_indicate_version() {
 	Serial.write(FEND);
 }
 
+void kiss_indicate_platform() {
+	Serial.write(FEND);
+	Serial.write(CMD_PLATFORM);
+	Serial.write(PLATFORM);
+	Serial.write(FEND);
+}
+
+void kiss_indicate_mcu() {
+	Serial.write(FEND);
+	Serial.write(CMD_MCU);
+	Serial.write(MCU_VARIANT);
+	Serial.write(FEND);
+}
+
 bool isSplitPacket(uint8_t header) {
 	return (header & FLAG_SPLIT);
 }
@@ -384,9 +495,21 @@ void kiss_dump_eeprom() {
 	Serial.write(FEND);
 }
 
+void eeprom_update(int mapped_addr, uint8_t byte) {
+	#if MCU_VARIANT == MCU_1284P || MCU_VARIANT == MCU_2560
+		EEPROM.update(mapped_addr, byte);
+	#elif MCU_VARIANT == MCU_ESP32
+		if (EEPROM.read(mapped_addr) != byte) {
+			EEPROM.write(mapped_addr, byte);
+			EEPROM.commit();
+		}
+	#endif
+
+}
+
 void eeprom_write(uint8_t addr, uint8_t byte) {
 	if (!eeprom_info_locked() && addr >= 0 && addr < EEPROM_RESERVED) {
-		EEPROM.update(eeprom_addr(addr), byte);
+		eeprom_update(eeprom_addr(addr), byte);
 	} else {
 		kiss_indicate_error(ERROR_EEPROM_LOCKED);
 	}
@@ -394,9 +517,9 @@ void eeprom_write(uint8_t addr, uint8_t byte) {
 
 void eeprom_erase() {
 	for (int addr = 0; addr < EEPROM_RESERVED; addr++) {
-		EEPROM.update(eeprom_addr(addr), 0xFF);
+		eeprom_update(eeprom_addr(addr), 0xFF);
 	}
-	while (true) { led_tx_on(); led_rx_off(); }
+	hard_reset();
 }
 
 bool eeprom_lock_set() {
@@ -408,7 +531,8 @@ bool eeprom_lock_set() {
 }
 
 bool eeprom_product_valid() {
-	if (EEPROM.read(eeprom_addr(ADDR_PRODUCT)) == PRODUCT_RNODE) {
+	uint8_t rval = EEPROM.read(eeprom_addr(ADDR_PRODUCT));
+	if (rval == PRODUCT_RNODE || rval == PRODUCT_HMBRW || rval == PRODUCT_TBEAM) {
 		return true;
 	} else {
 		return false;
@@ -417,7 +541,7 @@ bool eeprom_product_valid() {
 
 bool eeprom_model_valid() {
 	model = EEPROM.read(eeprom_addr(ADDR_MODEL));
-	if (model == MODEL_A4 || model == MODEL_A9) {
+	if (model == MODEL_A4 || model == MODEL_A9 || model == MODEL_FF || model == MODEL_E4 || model == MODEL_E9) {
 		return true;
 	} else {
 		return false;
@@ -475,21 +599,21 @@ void eeprom_conf_load() {
 
 void eeprom_conf_save() {
 	if (hw_ready && radio_online) {
-		EEPROM.update(eeprom_addr(ADDR_CONF_SF), lora_sf);
+		eeprom_update(eeprom_addr(ADDR_CONF_SF), lora_sf);
-		EEPROM.update(eeprom_addr(ADDR_CONF_CR), lora_cr);
+		eeprom_update(eeprom_addr(ADDR_CONF_CR), lora_cr);
-		EEPROM.update(eeprom_addr(ADDR_CONF_TXP), lora_txp);
+		eeprom_update(eeprom_addr(ADDR_CONF_TXP), lora_txp);
 
-		EEPROM.update(eeprom_addr(ADDR_CONF_BW)+0x00, lora_bw>>24);
+		eeprom_update(eeprom_addr(ADDR_CONF_BW)+0x00, lora_bw>>24);
-		EEPROM.update(eeprom_addr(ADDR_CONF_BW)+0x01, lora_bw>>16);
+		eeprom_update(eeprom_addr(ADDR_CONF_BW)+0x01, lora_bw>>16);
-		EEPROM.update(eeprom_addr(ADDR_CONF_BW)+0x02, lora_bw>>8);
+		eeprom_update(eeprom_addr(ADDR_CONF_BW)+0x02, lora_bw>>8);
-		EEPROM.update(eeprom_addr(ADDR_CONF_BW)+0x03, lora_bw);
+		eeprom_update(eeprom_addr(ADDR_CONF_BW)+0x03, lora_bw);
 
-		EEPROM.update(eeprom_addr(ADDR_CONF_FREQ)+0x00, lora_freq>>24);
+		eeprom_update(eeprom_addr(ADDR_CONF_FREQ)+0x00, lora_freq>>24);
-		EEPROM.update(eeprom_addr(ADDR_CONF_FREQ)+0x01, lora_freq>>16);
+		eeprom_update(eeprom_addr(ADDR_CONF_FREQ)+0x01, lora_freq>>16);
-		EEPROM.update(eeprom_addr(ADDR_CONF_FREQ)+0x02, lora_freq>>8);
+		eeprom_update(eeprom_addr(ADDR_CONF_FREQ)+0x02, lora_freq>>8);
-		EEPROM.update(eeprom_addr(ADDR_CONF_FREQ)+0x03, lora_freq);
+		eeprom_update(eeprom_addr(ADDR_CONF_FREQ)+0x03, lora_freq);
 
-		EEPROM.update(eeprom_addr(ADDR_CONF_OK), CONF_OK_BYTE);
+		eeprom_update(eeprom_addr(ADDR_CONF_OK), CONF_OK_BYTE);
 		led_indicate_info(10);
 	} else {
 		led_indicate_warning(10);
@@ -497,7 +621,7 @@ void eeprom_conf_save() {
 }
 
 void eeprom_conf_delete() {
-	EEPROM.update(eeprom_addr(ADDR_CONF_OK), 0x00);
+	eeprom_update(eeprom_addr(ADDR_CONF_OK), 0x00);
 }
 
 void unlock_rom() {
@@ -544,6 +668,7 @@ inline void fifo_flush(FIFOBuffer *f) {
   f->head = f->tail;
 }
 
+#if MCU_VARIANT != MCU_ESP32
 	static inline bool fifo_isempty_locked(const FIFOBuffer *f) {
 	  bool result;
 	  ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
@@ -565,7 +690,9 @@ static inline void fifo_push_locked(FIFOBuffer *f, unsigned char c) {
 	    fifo_push(f, c);
 	  }
 	}
+#endif
 
+/*
 static inline unsigned char fifo_pop_locked(FIFOBuffer *f) {
   unsigned char c;
   ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
@@ -573,6 +700,7 @@ static inline unsigned char fifo_pop_locked(FIFOBuffer *f) {
   }
   return c;
 }
+*/
 
 inline void fifo_init(FIFOBuffer *f, unsigned char *buffer, size_t size) {
   f->head = f->tail = f->begin = buffer;
@@ -622,14 +750,18 @@ inline void fifo16_flush(FIFOBuffer16 *f) {
   f->head = f->tail;
 }
 
+#if MCU_VARIANT != MCU_ESP32
 	static inline bool fifo16_isempty_locked(const FIFOBuffer16 *f) {
 	  bool result;
 	  ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
 	    result = fifo16_isempty(f);
 	  }
+
 	  return result;
 	}
+#endif
 
+/*
 static inline bool fifo16_isfull_locked(const FIFOBuffer16 *f) {
   bool result;
   ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
@@ -638,6 +770,7 @@ static inline bool fifo16_isfull_locked(const FIFOBuffer16 *f) {
   return result;
 }
 
+
 static inline void fifo16_push_locked(FIFOBuffer16 *f, size_t c) {
   ATOMIC_BLOCK(ATOMIC_RESTORESTATE) {
     fifo16_push(f, c);
@@ -651,6 +784,7 @@ static inline size_t fifo16_pop_locked(FIFOBuffer16 *f) {
   }
   return c;
 }
+*/
 
 inline void fifo16_init(FIFOBuffer16 *f, size_t *buffer, size_t size) {
   f->head = f->tail = f->begin = buffer;