Hi! Today we will add a relay to the PLC module and see how it works.

Figure 1

This tutorial will teach you to wield a soldering iron. Manage the load with M5.

Short help

List of components for the lesson:

• PC;
• M5STACK;
• USB-C cable from standard set;
• additional PLC module;
• mains socket;
• mains plug;
• external power supply 12 V;
• wires under load;
• relay 250 V 10 a control voltage 5 V;
• transistor 2N2222A;
• resistor 1 kOhm;
• soldering iron;
• solder;
• tooling.

Let's start!

Step 1. Installation

Take a relay, transistor and resistor and solder it to the PCB of the PLC module according to the scheme shown in figure 2.

Figure 2

Approximately should look like after Assembly of components (Fig. 2.1).

Figure 2.1

Step 2. Assembly

Now assemble the module in the case (Fig. 3 - 3.1).

Figure 3

Figure 3.1

Step 3. Mains plug

In order to connect our module to the power supply we need to prepare a plug with special plugs (Fig. 4).

Figure 4

Step 4. Socket

Connect the wire to the socket and a special connector (Fig. 5).

Figure 5

Step 5. Connect

Plug the plug and sockets into the device, then plug in the power supply (Fig. 6).

Figure 6

Step 6. Load the sketch

Figure lightOn and lightOff files are available via the link in the **Downloads * * section.

#include <M5Stack.h>

extern unsigned char lightOn[];
extern unsigned char lightOff[];

void setup(){
  M5.begin();
  pinMode(5, OUTPUT);
  M5.Lcd.setBrightness(100);
}

void loop() {
  M5.Lcd.drawBitmap(126, 70, 100, 100, (uint16_t *) lightOff);
  digitalWrite(5, HIGH);
  delay (1500);
  M5.Lcd.drawBitmap(126, 70, 100, 100, (uint16_t *)lightOn);
  digitalWrite(5, LOW);
  delay (1500);
}

After the sketch is loaded, the device starts clicking the relay (Fig. 7 - 7.1).

Figure 7

Figure 7.1

Final step

That's all. :)

Downloads

• Video (YouTube): https://youtu.be/_07uW7Cve8Q
• LightOn and lightOff (Yandex.Disk): https://yadi.sk/d/65SleNXxa0X_dw