HC 12 Uart Transciever Part-3 Improved code – Sharing Code
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/*By Roee Bloch - Version 4 * This includes: Latch Mode, Momentary Mode (selected by A5 input), and also feedback to Transmitter that the Receiver got transmission OK - by LED on Transmitter * Controls 4 logic output at 2 modes: Latch (each press change output ON/OFF), Momentary (output on just when button is pressed) *HC-12 Moule Transciever Same code is for Transmitter and Receiver, setup through A4 Input *Tested on Arduino Nano * This SW is for Transmitter & Receiver, the choise is done by reading A4 & A5 inputs (analog inputs) * A4=1=> TX, A4=0=>RX * A5=1=>LATCH (Default mode), A5=0=>Momentary the stting now is via variable latch_logic if 1=> latch if 0=> momentary * * NANO connections to HC-12 As follows: * ARDUINO NANO HC-12-MODULE * _________________________________________________________________________ * 5V -> 1N4148 Anode, 1N4148 catode -> HC-12/Pin-1 (VCC) * GND -------> GND * D11 -------> RXD * D10 -------> TXD * * NANO (TX MODULE) NANO (RX MODULE) * ______________________ ________________________________ * D2 --> SW --> GND (SW1) A4 --> GND * D3 --> SW --> GND (SW2) D2 --> OUTPUT 1 * D4 --> SW --> GND (SW3) D3 --> OUTPUT 2 * D5 --> SW --> GND (SW4) D4 --> OUTPUT 3 * D5 --> OUTPUT 4 * * FEEDBACK back will light Led on Trnasmitter for 100mS * See connection Diagram here: * https://goo.gl/photos/qog8gWPKpSDPgZen7 * */ #define P1 2 #define P2 3 #define P3 4 #define P4 5 #define F1 6 // feedback back to transmitter //#define latch_logic 1 // if 1 then latch if 0 momentary #include <SoftwareSerial.h> SoftwareSerial mySerial(10, 11); // RX, TX char latch; // , if latch=1 then Latch int read_A4, read_A5, i, read_P1, read_P2, read_P3, read_P4; int TX_CODE, RX_READ, mode, TX_CODE_OLD; //if mode= 1 then TX int RP1, RP2, RP3, RP4; volatile byte SW1 = 0, SW2 = 0, SW3 = 0, SW4 = 0; boolean S1, S2, S3, S4; byte TEST; char TXTOSEND,feedback; int FLAG=1,latch_logic; void setup() { Serial.begin(9600); mySerial.begin(9600); Serial.println("Hello HC-12 TX and RX SW, A4-Low=TX A4-HIGH=RX A5-LOW=Momemtary A5-HIGH=LATCH"); // mySerial.println("Hello HC-12 TX and RX SW, A4-Low=TX A4-HIGH=RX A5-LOW=Momemtary A5-HIGH=LATCH"); // This is for internal pull ups resistors on A4 and A5 Inputs delay(500); pinMode(A4, INPUT_PULLUP); pinMode(A5, INPUT_PULLUP); read_A4 = analogRead(A4); read_A5 = analogRead(A5); if ((read_A4) > 500) { mode = 1; Serial.println("TX Mode"); } else { mode = 0; Serial.println("RX Mode"); } if ((read_A5) > 500) { latch = 1; latch_logic=latch; Serial.println("LATCH Mode"); } else { latch = 0; latch_logic=latch; Serial.println("Momentary Mode"); } if (mode == 1) // TX { pinMode(P1, INPUT); // set pin to input digitalWrite(P1, HIGH); // turn on pullup resistors pinMode(P2, INPUT); // set pin to input digitalWrite(P2, HIGH); // turn on pullup resistors pinMode(P3, INPUT); // set pin to input digitalWrite(P3, HIGH); // turn on pullup resistors pinMode(P4, INPUT); // set pin to input digitalWrite(P4, HIGH); // turn on pullup resistors pinMode(F1, OUTPUT); // set pin to input digitalWrite(F1, LOW); } else { pinMode(P1, OUTPUT); // set pin to input digitalWrite(P1, LOW); // turn on pullup resistors pinMode(P2, OUTPUT); // set pin to input digitalWrite(P2, LOW); // turn on pullup resistors pinMode(P3, OUTPUT); // set pin to input digitalWrite(P3, LOW); // turn on pullup resistors pinMode(P4, OUTPUT); // set pin to input digitalWrite(P4, LOW); // turn on pullup resistors } } void loop() { if (mode == 1) //TX Mode { TX_MODE(); } else { RX_MODE(); } } void TX_MODE() { while (1) { { read_P1 = digitalRead(P1); read_P2 = digitalRead(P2); read_P3 = digitalRead(P3); read_P4 = digitalRead(P4); TX_CODE = 64 + (read_P1 * 1) + (read_P2 * 2) + (read_P3 * 4) + (read_P4 * 8); // converting TX to one char TXTOSEND = TX_CODE; // conver to char for sending OK if (FLAG==0) // skip first time on FLAG=1 { if (latch==1) { if ((TX_CODE != TX_CODE_OLD)&&(latch_logic==1)) // transmit only on change { Serial.print(TX_CODE, BIN); mySerial.print(TXTOSEND); } delay(100); TX_CODE_OLD = TX_CODE; } else { Serial.print(TX_CODE, BIN); mySerial.print(TXTOSEND); delay(100); } } else FLAG=0; } feedback=mySerial.read(); if (feedback=='R') { Serial.println("Data_Sent_OK"); // feedback to serial port digitalWrite(F1, HIGH); // Ligjt Led Back on Transmitter delay(80); digitalWrite(F1, LOW); } } } void RX_MODE() { while (1) { if (mySerial.available()) { // read the incoming byte: RX_READ = mySerial.read(); TEST = RX_READ; RP1 = (TEST) & (1); RP2 = (TEST) & (2); RP3 = (TEST) & (4); RP4 = (TEST) & (8); mySerial.flush(); // When button is pressed (logic 0) toggling the apropriate LED Latch mode only if ((latch==1)&&(latch_logic==1)) { if (RP1 == 0) SW1 = ~(SW1); if (RP2 == 0) SW2 = ~(SW2); if (RP3 == 0) SW3 = ~(SW3); if (RP4 == 0) SW4 = ~(SW4); mySerial.print("R"); // This is feedback back to transmitter } else // Momentary mode ON only when button is pressed continously { if (RP1 == 0) { SW1 = 1; mySerial.print("R"); // This is feedback back to transmitter } else SW1=0; if (RP2 == 0) { SW2 = 1; mySerial.print("R"); // This is feedback back to transmitter } else SW2=0; if (RP3 == 0) { SW3 = 1; mySerial.print("R"); // This is feedback back to transmitter } else SW3=0; if (RP4 == 0) { SW4 = 1; mySerial.print("R"); // This is feedback back to transmitter } else SW4=0; } //convert to bit for Digital-Out from Arduino S1= SW1 & 1; S2= SW2 & 1; S3= SW3 & 1; S4= SW4 & 1; digitalWrite(P1, S1); digitalWrite(P2, S2); digitalWrite(P3, S3); digitalWrite(P4, S4); delay(100); Serial.print("S1="); Serial.print(SW1); Serial.print(" S2="); Serial.print(SW2); Serial.print(" S3="); Serial.print(SW3); Serial.print(" S4="); Serial.println(SW4); } } } |
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Link to USB to UART for Configuring the Module on Ebay: USB FT232 Dual Voltage configuration
Connection Diagram is here: Connection Diagram
Link to Manual: Manual PDF