Digilog ESP32 Super Mini Dev Board Instructions

        #define LED_BUILTIN 8
        char myData[10];

        void setup() {
            Serial.begin(9600);
            pinMode(LED_BUILTIN, OUTPUT);
        }

        void loop() {
            digitalWrite(LED_BUILTIN, HIGH);
            delay(1000);
            digitalWrite(LED_BUILTIN, LOW);
            delay(1000);

            byte n = Serial.available();
            if (n != 0) {
                byte m = Serial.readBytesUntil('n', myData, sizeof(myData)-1);
                myData[m] = '';
                Serial.println(myData);
            }
            Serial.println("Hello");
        }

Setup-2:

Board: LOLIN C3 Mini

USB CDC on Boot: Enabled

Port: COM13 (ESP32S3 Dev Module)

Output:

        Hello Hello Arduino
        // From InputBox of Serial Monitor to ESP32C3 to OutputBox of Serial Monitor
        Hello Hello

Product Usage Tips:

Do not place the ESP32C3 Super Mini Board on the Breadboard to
avoid contact problems.
The onboard LED is connected at DPin-8.
Use a male-female jumper and connect the female side at DPin-9
to act as an external switch/button.
The connection diagram of the onboard LED and button is similar
to Fig-1.

Programming Steps:

Select Board as follows: IDE 2.3.1 –> Tools –> ESP32
–> LOLIN C3 Mini USB CDC On Boot: Enabled.
Upload the provided sketch to the board.
Check that the onboard LED is off initially.
Closing the switch will make the onboard LED start blinking at
a 2-second interval.

Verification Steps:

Ensure that the onboard LED is off.
Gently touch the male side of the hanging wire/jumper with
G-pin of the Mini Board.
Confirm that the onboard LED is blinking at a 2-second
interval.
Press the RST (Reset) Button of the Mini Board and repeat the
process if needed.

Frequently Asked Questions (FAQ):

Q: What is LOLIN C3?

A: LOLIN C3 is a board type compatible with the ESP32 Super Mini
Dev Board, providing specific configurations for communication and
programming.

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**1.** My ESP32 Super Mini Dev Board (Fig-1) accepts sketch from PC, but it does not communicate with Serial Monitor (Bd = 9600) though the onBoard LED (at GPIO8) blinks. ![image|403×203](upload://pRi2u3tDsAxTivzokiEplEtzhlC.jpeg) Figure-1:

*Setup-1:* Board: “ESP32C3 Dev Module” USB CDC on Boot: “Enabled” Port: “COM13 (ESP32S3 Dev Module)” //no other option

**Sketch:** “` #define LED_BUILTIN 8 char myData[10];

void setup() { Serial.begin(9600); pinMode(LED_BUILTIN, OUTPUT); }

void loop()

{

digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)

delay(1000);

// wait for a second

digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW

delay(1000);

byte n = Serial.available();

if (n != 0)

{

byte m = Serial.readBytesUntil(‘n’, myData, sizeof (myData)-1);

myData[m] = ”;

Serial.println(myData); } Serial.println(“Hello”); } “` **2.** The following setup has solved the problem. *Setup-2:* Board: “LOLIN C3 Mini” USB CDC on Boot: “Enabled” Port: “COM13 (ESP32S3 Dev Module)” Bd = 9600
**3.** Output: “` Hello Hello Arduino //From InputBox of SM to ESP32C3 to OutputBox of SM Hello Hello “` **4.** Would be glad to hear your opinion as to — “what is LOLIN C3”.

1. Do not place your ESP32C3 Super Mini Board on the Breadboard. I strongly suspect conatct problem. 2. OnBoard LED is already there on the Board and is connected at DPin-8. 3. Take male-female jumper. Connect the fmale side at DPin-9. Leave the male side hanging. This jumper will work as your external Switch/Button. 4. The connection diagram of onBoard LED and Button is something similar to Fig-1.
sw1led1ESP32c3716×459 20 KB
Figure-1:

5. Select Board as follows: IDE 2.3.1 —> Tools —-> ESP32 —-> LOLIN C3 Mini USB CDC On Boot: “Enabled”
6. Upload the following sketch. Intially, the onBoard LED is Off. When Swicth is closed, the oBoard LED starts blinking at 2-sec interval.
#define LED_BUILTIN 8 #define BTN 9
void setup() { Serial.begin(9600); while (!Serial) { ; } pinMode(LED_BUILTIN, OUTPUT); pinMode(BTN, INPUT_PULLUP); //input pull-up resistor is enabled digitalWrite(LED_BUILTIN, HIGH); //onBoard is Off; I have got like this
}
void loop() {
if (digitalRead(BTN) == LOW) //Switch K1 is closed; blink onBoard LED {
while (true) { digitalWrite(LED_BUILTIN, HIGH); //onBoard LED is On delay(1000); digitalWrite(LED_BUILTIN, LOW); //onBoard LED is Off delay(1000); } } }
7. Check that onBoard LED is Off.
8. Gently, touch the male side of the hangig wire/jumpwe with G-pin of the Mini Board.
9. Check that the onBoard LED is blinking at 2-sec interval.
10. Press RST Button of the Mini Board and repeat the process.

Documents / Resources

Digilog ESP32 Super Mini Dev Board [pdf] Instructions
ESP32 Super Mini Dev Board, ESP32, Super Mini Dev Board, Mini Dev Board, Board

References

User Manual

Digilog ESP32 Super Mini Dev Board Instructions

ESP32 Super Mini Dev Board

Product Information

Specifications:

Product Usage Instructions

Setup-1:

Sketch: