I list some cases with using SIM commands like AT+CIMI which result in “ERROR: SIM failure”. Common problems are listed along with solutions.
Here is how you can power multiple servo motors from a LiPo battery pack. This is the best option to power hexapods and humanoid robots.
Notes on using STM32 with ESP32 AT Module. The PCB Artists ESP32 AT SDIO module is loaded with SDIO AT firmware for use with IoT designs.
ESP32 4G modem interface allows you to add cellular internet connectivity to your IoT designs. Find schematics, PCB guidelines and code here.
STM32 RGB display output can be used to drive LVDS LCD displays. In this article, we cover the basics of STM32 LVDS interface with example.
Adding WiFi to STM32 can open up a lot of possibilities for IoT and industrial automation applications. We explore some STM32 WiFi options.
A tutorial on selecting an STM32 audio codec interfacing – selecting an STM32 MCU, assigning I2S peripheral and running audio examples.
Here are some design specifications and guidelines worth keeping in mind when making your own custom RP2040 PCB design.
ESP32 multiple antenna designs can be good in long range applications and where link quality is important, for example, in wireless audio.
An illustrated article on chip antenna PCB layout with focus on 2.4 GHz WiFi and Bluetooth antennas. Applicable to ESP32, ESP8266, nRF52, etc.