esp-idf-mqtt-image-viewer

Image viewer using mqtt and SPI TFT.

Software requirements

ESP-IDF V5.0 or later. ESP-IDF V4.4 release branch reached EOL in July 2024. ESP-IDF V5.1 is required when using ESP32-C6.

Hardware requirements

SPI TFT. Supported TFTs: https://github.com/nopnop2002/esp-idf-ili9340

Installation

git clone https://github.com/nopnop2002/esp-idf-mqtt-image-viewer
cd esp-idf-mqtt-image-viewer/
idf.py set-target {esp32/esp32s3/esp32c3/esp32c6}
idf.py menuconfig
idf.py flash

Note for ESP32-S2/C2 ESP32-S2/C2 has less SRAM, so it cannot be executed.

Configuration

Network Configure

You have to set this config value with menuconfig.

• CONFIG_ESP_WIFI_SSID
  SSID of your wifi.
• CONFIG_ESP_WIFI_PASSWORD
  PASSWORD of your wifi.
• CONFIG_ESP_MAXIMUM_RETRY
  Maximum number of retries when connecting to wifi.
• CONFIG_BROKER_URL
  MQTT Broker url or IP address to use.
  You can download the MQTT broker from here.
• CONFIG_MQTT_TOPIC
  MQTT topic to subscribe.

TFT Configure

Follow here.

How to use

mosquitto_pub -d -h your_broker -t image/example -f esp32.jpeg

mosquitto_pub -d -h your_broker -t image/example -f esp_logo.png