The partition table was the problem. To fix it, I did the following: make menuconfig Partition Table Factory App, two OTA definitions Save Exit I then ran make erase_flash flash and reflashed. I kept getting the error OTA Write Header format Check Failed! so I changed the code in the resolve_pkg fun...

I've tried to get the OTA example working found in the esp-idf. I tried following the steps given, but it resulted in lots of errors. A few examples of those errors. esp-idf/examples/system/ota/build/esp32/libesp32.a(system_api.o):(.iram1.literal+0x34): undefined reference to `esp_wifi_stop' /esp32/...

Mine is identical to the one shown in the link...

Thanks for the reply. I did a git pull on the esp-idf, and it solved my problem.

I am able to connect to a router with SSID "Test-Net" and passcode "passpass" with the Arduino code below. /* * This sketch sends data via HTTP GET requests to data.sparkfun.com service. * * You need to get streamId and privateKey at data.sparkfun.com and paste them * below. Or just customize this s...

I bought the same two items: ESP32-Bit and ESP32-T. I soldered the ESP32-Bit on top of the ESP32-T All of my pins were labeled, and it started working pretty quickly. I did have to add an external 3.3V power supply to get a good wifi connection. I also had to download the usb driver.

SOLVED! The code is now working. I needed to write to the slave and then read it. /* * test_main.c * * Created on: Jan 24, 2017 * Author: Greg */ #include <stdio.h> #include "driver/i2c.h" #define MCP23017_ADDR 0x23 /*!< slave address for MCP23017 sensor */ #define ACK_CHECK_EN 0x1 #define I2C_MASTE...

Thanks for the help! One other common I2C Problem: Do you have pull-up resistors on the clock and data lines to 3V3? 2K to 5K are common values. The ESP-32 has internal pull up resistors which I am using. Thanks for the suggestion! I was able to get outputs working with the following code. /* * test...

I am trying to use a MCP23017 port expander in c via i2c with the ESP32. The only example code for i2c I have been able to find is https://github.com/espressif/esp-idf/tree/6bc9cd3/examples/peripherals/i2c. This code is for a light sensor. Arduino has some code for using this IC on the aduino uno, b...