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    • R

      Cant upload program to esp32 using my custom circuit
      ESP32 • • Richu Bini

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      A

      @Richu-Bini I'm not sure if this is the root cause but normally, you should add an RC delay on the EN pin. This is because the BOOT pin should reach 3.3V before the EN reaches 3.3V hence, the RC delay on the EN pin. A 10K resistor and a 1μF Cap should do it. Here's a sketch on how it should look like:
      RC delay on ESP.jpg

      Here is the part in the datasheet of the WROOM32 that tells you to do it:
      WROOM_Data.PNG

    • A

      Max30102,MPU6050 and Esp8266
      ESP32 • • Adithya SM

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      salmanfaris

      @Adithya-SM Can you confirm the I2C address is correct? You can use this I2C Scanner to program to find the correct address

      // -------------------------------------- // i2c_scanner // // Modified from https://playground.arduino.cc/Main/I2cScanner/ // -------------------------------------- #include <Wire.h> // Set I2C bus to use: Wire, Wire1, etc. #define WIRE Wire void setup() { WIRE.begin(); Serial.begin(9600); while (!Serial) delay(10); Serial.println("\nI2C Scanner"); } void loop() { byte error, address; int nDevices; Serial.println("Scanning..."); nDevices = 0; for(address = 1; address < 127; address++ ) { // The i2c_scanner uses the return value of // the Write.endTransmisstion to see if // a device did acknowledge to the address. WIRE.beginTransmission(address); error = WIRE.endTransmission(); if (error == 0) { Serial.print("I2C device found at address 0x"); if (address<16) Serial.print("0"); Serial.print(address,HEX); Serial.println(" !"); nDevices++; } else if (error==4) { Serial.print("Unknown error at address 0x"); if (address<16) Serial.print("0"); Serial.println(address,HEX); } } if (nDevices == 0) Serial.println("No I2C devices found\n"); else Serial.println("done\n"); delay(5000); // wait 5 seconds for next scan }
    • MakerGram

      MakerChat 0x14 : Community Gathering
      MakerChat • • MakerGram

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    • S

      Can't connect NodeMCU with MQTT
      Arduino • • sivanath

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      S

      @salmanfaris Actually, I can't connect my NodeMCU device with the localhost server. I can establish a connection using the test.mosquitto.org server.
      This is my required case: YouTube link

    • MakerGram

      MakerChat 0x13 : Microchip's SAM Ds & Arduino
      MakerChat • • MakerGram

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      No one has replied

    • abijith

      8085 Microprocessor
      General Discussion • • abijith

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      No one has replied

    • abijith

      Blinking LED using Arduino UNO
      Arduino • • abijith

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      salmanfaris

      @abijith Thanks for sharing 🙌.

    • MakerGram

      Raspberry pi released new Camera module 3: The classic compact camera for Raspberry Pi with a 12MP sensor and autofocus
      Raspberry Pi • • MakerGram

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      salmanfaris

      https://www.youtube.com/watch?v=1EIFfln3Kxs&t=1s

    • MakerGram

      ​MakerChat 0x11: Build Autonomous Robots Using ROS 🤖
      MakerChat • • MakerGram

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      No one has replied

    • MakerGram

      MakerChat 0x10 - Introduction to Matter Protocol 📡
      MakerChat • • MakerGram

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      @MakerGram The session was good. Looking forward to attend future sessions of MakerChat.