Latest Wireless/RF Technical Articles

You can buy cheap 433MHz RF modules from Mouser and DigiKey. This article will show you how to use them with a PICAXE…

You can buy cheap 433MHz RF modules from Mouser and DigiKey. This article will show you how to use them with a PICAXE microcontroller to hack your own mousetraps.

This article demonstrates how to use the built-in die temperature sensor on the nRF51. The die temperature is not the…

This article demonstrates how to use the built-in die temperature sensor on the nRF51. The die temperature is not the same as ambient temperature, but can be calibrated to ambient temperature by using a correction factor.

It's never been cheaper to round up a ton of quality hardware for open source projects! Here's what you need to know…

It's never been cheaper to round up a ton of quality hardware for open source projects! Here's what you need to know about the eBay experience.

This article reviews the basics of finding Thevenin and Norton equivalents and discusses how to apply Thevenin's theorem…

This article reviews the basics of finding Thevenin and Norton equivalents and discusses how to apply Thevenin's theorem to a practical circuit.

Use your Android device to open and close your garage door! Much better than that clunky remote you've been using.

Use your Android device to open and close your garage door! Much better than that clunky remote you've been using.

Create a wireless "relative comfort" light bar thermometer by broadcasting temperature data across multiple ESP8266…

Create a wireless "relative comfort" light bar thermometer by broadcasting temperature data across multiple ESP8266 modules running NodeMCU using MQTT.

How to add BLE capabilities to a wireless ceiling fan by incorporating the nRF51 in the remote control. Part of our…

How to add BLE capabilities to a wireless ceiling fan by incorporating the nRF51 in the remote control. Part of our series on the nRF51.

This article demonstrates porting FreeRTOS to the nRF51 with a softdevice so you can use an RTOS with the BLE functionality.

This article demonstrates porting FreeRTOS to the nRF51 with a softdevice so you can use an RTOS with the BLE functionality.

Thread, a network protocol released July 2015, is optimized for the connected home network. It is IPv6 based, uses IEEE…

Thread, a network protocol released July 2015, is optimized for the connected home network. It is IPv6 based, uses IEEE Standard 802.15.4 and runs on existing hardware.

How to create a custom BLE GATT peripheral using the nRF51 by creating a service and characteristics.

How to create a custom BLE GATT peripheral using the nRF51 by creating a service and characteristics.

Learn how to communicate with a custom BLE peripheral using an Android device.

Learn how to communicate with a custom BLE peripheral using an Android device.

Part 3 in the “How to Make an EFM8-Based Sound Synthesizer” series.

Part 3 in the “How to Make an EFM8-Based Sound Synthesizer” series.

MQ Telemetry Transport (MQTT) is a popular low-overhead messaging protocol used by many IoT devices to communicate. This…

MQ Telemetry Transport (MQTT) is a popular low-overhead messaging protocol used by many IoT devices to communicate. This tutorial will show the user how to to set up a basic MQTT network using Python on his or her computer and an ESP8266 running the NodeMCU firmware.

How to set up the build environment for the nRF51 system-on-chip using makefiles and ARM-GCC.

How to set up the build environment for the nRF51 system-on-chip using makefiles and ARM-GCC.

Part 2 in the “How to Make an EFM8-Based Sound Synthesizer” series.

Part 2 in the “How to Make an EFM8-Based Sound Synthesizer” series.

ZigBee, Bluetooth and the newer Bluetooth Low Energy (BLE/Smart) are all communication protocols for Wireless Personal…

ZigBee, Bluetooth and the newer Bluetooth Low Energy (BLE/Smart) are all communication protocols for Wireless Personal Area Networks (WPANs), but they are optimized for different applications.

Part 1 in the “How to Make an EFM8-Based Sound Synthesizer” series, which will design a sound synthesizer that can…

Part 1 in the “How to Make an EFM8-Based Sound Synthesizer” series, which will design a sound synthesizer that can play standard musical notes. We will accomplish this using a low-cost, small-form-factor EFM8 microcontroller in conjunction with a few external components and a speaker.

Learn how to set up the Wunderbar platform to begin building your own IoT apps. This will demonstrate the "Can't Touch…

Learn how to set up the Wunderbar platform to begin building your own IoT apps. This will demonstrate the "Can't Touch This" and "Tell Me When" demo applications to measure WunderBar sensors and perform actions based on them. Some of the major bugs are discussed.

This article will go into a bit of the background of FSK and demonstrate writing a simulator in Python.

This article will go into a bit of the background of FSK and demonstrate writing a simulator in Python.