Recently I got two STM32 LoRa Discovery boards(B-L072Z-LRWAN1) for my LoRa project, and I need to install STM32CubeIDE and an STM32 Expansion Package i-cube-lrwan in order to use the board. It took me a while to figure out everything and I thought it would be good to share how I set everything up. Continue reading "How to Install STM32CubeIDE on Mac and STM32 LoRa Discovery Kit"
Continue from previous article where I examines the RAK7243 Lora gateway, in this article I take a look at RAK5205. I like the RAK7243 but couldn't say the same for RAK5205 for several reasons... Continue reading "Lora – Part 2: RAK5205 LPWAN Tracker Board"
A week ago, I got a chance to borrow a RAKWireless' RAK7243C LPWAN Developer Gateway and a few RAK5205 WisTrio modules for a test, and this is my first impression of the products with my understanding on how it works. Continue reading "Lora – Part 1: RAK7243C Lora Gateway"
I recently did a range test over a pair of ESP-01 running ESP-Now, by no means its a comprehensive test, but it gives a better understanding of ESP-01 wireless performance and the ESP-Now protocol. Continue reading "ESP-01 Range Test with ESP-Now Protocol"
It is important to understand how SPI (Serial Peripheral Interface) works in the embedded world because SPI is widely used deep inside embedded systems, ranging from sensor connection, to SD card interface, to even between the flash memory and its MCU. Continue reading "Do you know Arduino? – SPI and Arduino SPI Library"
On previous article, I wrote an Arduino sketch for interfacing LCD 5110 display module with Arduino, it is not an Arduino library that can be distributed and share with others yet. In this article, I will explain how to create an Arduino library in 6 easy steps. Continue reading "How to create Arduino Library from Arduino Sketch"
In this article, I will briefly explain on how to create a Python class library to interface with LCD 5110 display module and shares the common APIs with the Arduino LCD5110 library that I previously created. Continue reading "How to use LCD 5110 (PCD 8544) with Raspberry Pi"
LCD 5110 (a.k.a. Nokia 5110 or PCD8544) display is a commonly available LCD module with SPI interface, by writing our own LCD driver based on its data sheet, we could learn a lot about how the LCD module works and how to write SPI program and save a lot of SRAM memory. Continue reading "How to use LCD 5110 (PCD 8544) with Arduino"