Updating Readme file, and src files
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fatimaxsen committed
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+12
-54
@@ -1,65 +1,23 @@
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#include <Wire.h>
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#include <I2CRelay.h>
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#include <I2CMasterUtils.h>
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I2CRelay relayMaster(0x08); // Default address, can be changed via setAddress()
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I2CRelay relay;
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void setup() {
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Serial.begin(115200);
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delay(1000);
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relayMaster.begin();
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Serial.println("Enter:");
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Serial.println(" s - to scan I2C bus");
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Serial.println(" ch <old> <new> - to change slave address");
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Serial.println(" <relay> <on/off> - to set relay (e.g. 3 on)");
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relay.begin();
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Serial.println("8-Relay I2C Master Ready.");
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Serial.println("Commands:");
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Serial.println(" r <n> <0|1> - Set relay n (1-8) OFF/ON");
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Serial.println(" all <0|1> - Set all relays OFF/ON");
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Serial.println(" name <newname> - Set device name");
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Serial.println(" addr <newaddr> - Set I2C address (8-119)");
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Serial.println(" id - Query identification string");
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}
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void loop() {
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if (Serial.available()) {
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String input = Serial.readStringUntil('\n');
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input.trim();
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if (input == "s") {
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I2CMasterUtils::scanI2C();
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} else if (input.startsWith("ch")) {
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uint8_t oldAddr, newAddr;
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if (I2CMasterUtils::parseChangeAddressCommand(input, oldAddr, newAddr)) {
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I2CMasterUtils::changeSlaveAddress(oldAddr, newAddr);
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relayMaster.setAddress(newAddr); // Update master's address
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Serial.print("Changed address to 0x");
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Serial.println(newAddr, HEX);
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} else {
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Serial.println("Invalid command format. Use: ch <old_addr> <new_addr>");
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}
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} else {
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int spaceIndex = input.indexOf(' ');
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if (spaceIndex > 0) {
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String relayStr = input.substring(0, spaceIndex);
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String stateStr = input.substring(spaceIndex + 1);
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int relayNum = relayStr.toInt();
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bool state = false;
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stateStr.toLowerCase();
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if (stateStr == "on") state = true;
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else if (stateStr == "off") state = false;
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else {
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Serial.println("Invalid state! Use 'on' or 'off'.");
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return;
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}
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if (relayNum >= 1 && relayNum <= 8) {
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relayMaster.setRelay(relayNum, state);
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Serial.print("Relay ");
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Serial.print(relayNum);
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Serial.print(" turned ");
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Serial.println(state ? "ON" : "OFF");
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} else {
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Serial.println("Invalid relay number! Use 1-8.");
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}
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} else {
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Serial.println("Invalid command! Format: <relay_number> <on/off>");
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}
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}
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String cmd = Serial.readStringUntil('\n');
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cmd.trim();
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relay.handleSerialCommand(cmd);
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}
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}
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+91
-51
@@ -1,65 +1,105 @@
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#include <Wire.h>
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#include <EEPROM.h>
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// EEPROM settings
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#define ADDR_EEPROM_LOC 0
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#define EEPROM_SIZE 64
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#define DEFAULT_ADDRESS 0x08
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#define MAX_NAME_LENGTH 24
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// Relay pins: GPIO0 to GPIO7
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// EEPROM Structure
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struct Config {
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uint8_t address;
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char deviceName[MAX_NAME_LENGTH+1];
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uint8_t relayStates;
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};
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Config config;
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const int relayPins[8] = {0, 1, 2, 3, 4, 5, 6, 7}; // GPIOs 0-7
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uint8_t i2cAddress;
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// Unified I2C receive event
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void receiveEvent(int howMany) {
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if (howMany >= 2) {
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uint8_t first = Wire.read();
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uint8_t second = Wire.read();
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// Check for address change command
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if (first == 0xAA) {
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// Change I2C address and store in EEPROM
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uint8_t newAddr = second;
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EEPROM.write(ADDR_EEPROM_LOC, newAddr);
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EEPROM.commit();
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Serial.print("I2C address changed to: 0x");
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Serial.println(newAddr, HEX);
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delay(100);
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ESP.restart();
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return;
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}
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// Otherwise, treat as relay control
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int relay = first; // Relay number: 1-8
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int state = second; // State: 1=ON, 0=OFF
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if (relay >= 1 && relay <= 8) {
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digitalWrite(relayPins[relay - 1], state ? LOW : HIGH); // Active LOW relays
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}
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}
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}
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void handleCommand(int numBytes);
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void saveConfig();
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void loadConfig();
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void emergencyStop();
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void setup() {
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Serial.begin(115200);
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EEPROM.begin(EEPROM_SIZE);
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// Read I2C address from EEPROM or use default
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i2cAddress = EEPROM.read(ADDR_EEPROM_LOC);
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if (i2cAddress == 0xFF || i2cAddress == 0) i2cAddress = 0x08; // Default address
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Serial.print("Using I2C address: 0x");
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Serial.println(i2cAddress, HEX);
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// Initialize relay pins
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for (int i = 0; i < 8; i++) {
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EEPROM.begin(sizeof(Config));
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loadConfig();
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// Initialize relays
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for(int i=0; i<8; i++) {
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pinMode(relayPins[i], OUTPUT);
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digitalWrite(relayPins[i], HIGH); // Relays OFF initially (active LOW)
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digitalWrite(relayPins[i], HIGH); // Active-low logic
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}
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// Start I2C slave
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Wire.begin(i2cAddress);
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Wire.onReceive(receiveEvent);
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Wire.onReceive(handleCommand);
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Wire.onRequest([]() {
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String response = String(config.address) + ",8-relay," +
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config.deviceName + "," +
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String(config.relayStates, BIN);
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Wire.print(response);
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});
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Wire.begin((uint8_t)config.address);
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}
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void loop() {
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// Nothing needed here for basic operation
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void loop() { /* Empty */ }
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void handleCommand(int numBytes) {
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uint8_t cmd = Wire.read();
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switch(cmd) {
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case 0xA0: // Set relay state
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if(numBytes == 3) {
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uint8_t relay = Wire.read();
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uint8_t state = Wire.read();
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if(relay < 8) {
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digitalWrite(relayPins[relay], state ? LOW : HIGH);
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bitWrite(config.relayStates, relay, state);
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}
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}
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break;
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case 0xB0: // Emergency stop
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emergencyStop();
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break;
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case 0xC0: // Set address
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if(numBytes == 2) {
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config.address = Wire.read();
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saveConfig();
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Wire.begin((uint8_t)config.address);
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}
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break;
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case 0xD0: // Set device name
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if(numBytes > 1) {
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uint8_t i = 0;
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while(Wire.available() && i < MAX_NAME_LENGTH) {
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config.deviceName[i++] = Wire.read();
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}
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config.deviceName[i] = '\0';
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saveConfig();
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}
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break;
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}
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}
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void emergencyStop() {
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for(int i=0; i<8; i++) {
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digitalWrite(relayPins[i], HIGH);
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}
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config.relayStates = 0;
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}
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void loadConfig() {
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EEPROM.get(0, config);
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if(config.address < 0x08 || config.address > 0x77) {
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config.address = DEFAULT_ADDRESS;
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strcpy(config.deviceName, "8-Relay Module");
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saveConfig();
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}
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}
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void saveConfig() {
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EEPROM.put(0, config);
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EEPROM.commit();
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}
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