| In the last installment we built a small stand-alone device using the ESP32 Pico Kit, an RGB LED and an LDR, which we used to measure the am...
All items tagged with Cloud and RGB LED (12)
| In the last installment, we built a small device using the ESP32 DevKitC, an RGB LED and a light-dependant resistor (LDR). This device perio...
| In previous parts of this series we saw how to use a web page on a local network to configure an IoT device. In this part, we use a web pag...
| In the last episode, we configured the ESP32 to set up its own local Wi-Fi network. With a PC, smartphone or tablet, we are able to log into...
| In the last episode of this series we produced a small web server using the ESP32 DevKitC. On request from a web browser running on a PC or...
| In the recent installments, we used the MQTT protocol to exchange messages containing measurement values and commands between different clie...
| In this series we have developed MQTT clients able to send messages back and forth over the internet. With the summer break behind us we tak...
| The Pretzel board is a really useful tool especially when you are starting out with networks. Now however it was time to try out a different...
| In the last installment of this series, we developed a small sensor node based on the Pretzel board (equipped with an ATmega and ESP8266 WiF...
| In the last episode i built a small sensor board. The ATmega on the Pretzel board periodically takes a reading from a phototransistor and co...