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LoRaWAN Power Embedded Linux CANbus Electronics Hardware Wiki USB In a Nutshell Sneak Peek Search for: Zephyr Using STM32 HAL with Zephyr: Setting the Brown Out Reset Threshold October 27, 2023 Craig Peacock 0 The Zephyr RTOS has good support for the STM32 family, but every now and again you need to access something that is not supported. In my most recent experience, I needed to set the Brown-Out Reset (BOR) thresholds on a STM32WLE5CC. Adding vendor or device specific functions can break Zephyr’s … Embedded Linux Measuring DC Voltage, Current, Power, Energy & Charge with a Raspberry Pi May 20, 2023 Craig Peacock 2 Do you have a requirement to measure the voltage, current and power drawn from a battery or by a device using a Raspberry Pi? Perhaps you are also seeking to measure energy consumed (watt/hours) or charge (amp/hours) to determine state of charge (SoC) like a coulomb counter? If the answer … Zephyr DeviceTree Overlays on Zephyr RTOS: Adding I2C or SPI January 14, 2023 Craig Peacock 0 After 18 months developing with the Zephyr RTOS, I’m starting to become a strong proponent. In my opinion, one of the key advantages of the Zephyr RTOS is the hardware abstraction. It allows applications to be written for Zephyr that are platform independent and can be moved between different boards … Electric Vehicles Prototype IEC61851 / J1772 EVSE Interface January 30, 2022 Craig Peacock 6 This is a prototype IEC61851 / J1772 EVSE (Electric Vehicle Supply Equipment) Interface intended to connect to a 3.3V micro-controller of your choice. It was originally designed to piggyback on the Electric Vehicle Charge Controller PCB (shown above) and utilise the on-board Microchip dsPIC33 MCU. Firmware for the dsPIC33 is … Electric Vehicles IEC61851 / J1772 Electric Vehicle Charge Controller December 27, 2021 Craig Peacock 10 This device acts as the vehicle when connected to an EVSE (Electric Vehicle Supply Equipment) and negotiates the supply of power. It can be used in EV (Electric Vehicle) conversions, or in applications where you want to obtain power from public charging infrastructure – i.e., battery trailers to replace dirty … Electronics Hardware INA226 DC Voltage/Current/Power Monitor May 5, 2021 Craig Peacock 1 A breakout board for a DC Voltage/Current/Power Meter based on the popular INA226 36-V, Bi-Directional, Ultra-High Accuracy, I2C Current/Power Monitor with Alert. While many INA226 breakout boards are available from eBay/Banggood/AliExpress (e.g. CJMCU-226) they do not allow for easy connection of the bus voltage. In addition, we list different shunt resistor values … Software What is MQTT? April 19, 2021 Craig Peacock 0 MQTT stands for Message Queuing Telemetry Transport. It is a lightweight protocol designed for efficiently transporting messages between M2M or IoT devices. It uses a publish-subscribe model where devices publish information to a broker, and any number of clients can subscribe to them. For example, a temperature sensor device in … LoRaWAN LoRaWAN: Installing Basic Station and connecting to The Things Network V3 Stack February 18, 2021 Craig Peacock 14 With the migration of The Things Network to the version 3 stack, I thought it was an opportune time to upgrade my Raspberry PI based gateway from the legacy Semtech packet forwarder to Basic Station. Basic Station LoRaWAN gateway maintainers should be using secured and encrypted connections to the LoRaWAN … CAN - Controller Area Network Review: Huawei R4850G2 Power Supply 53.5VDC, 3kW with CAN December 27, 2020 Craig Peacock 48 The Huawei R4850G2 is a very capable 48V Telecommunications grade power supply available brand-new at cheap surplus prices (normally under $100 USD). Rated at 3000W, it can deliver a considerable 56.1A when powered from a suitable 200-240V rated AC source. The CAN2.0B interface allows for online monitoring and/or adjustment of … Electric Vehicles ESP32 DIN Rail Module December 17, 2020 Craig Peacock 9 I’ve been wanting to automate my EV (Electric Vehicle) charging. It’s a long story for another day. I had started out with a high level RS485 interface into my EVSE (Electric Vehicle Supply Equipment) and hit some ‘bugs’. A month later, it turned out much easier to fall back to … ESP32 ESP32-WROOM-32 Breakout Board December 16, 2020 Craig Peacock 2 Featured here is a breakout board for the Espressif Systems ESP32-WROOM modules incorporating a MCU with WiFi and Bluetooth connectivity. The board is designed to be minimalist and targeted towards battery operated devices. As such, no voltage regulator is included. For those not already familiar with the ESP32, this SoC … ESP32 Espressif esp-idf & Eclipse IDE: Debugging with JTAG and OpenOCD November 28, 2020 Craig Peacock 3 Developing ESP32 code by iteratively downloading code to your target via esptool can become laborious for anything but the smallest of projects. In addition to the UART Bootloader, the ESP32 can also be programmed and debugged via the JTAG interface. Debugging allows single stepping through your code, adding breakpoints and … ESP32 Getting Started with the Espressif esp-idf & Eclipse IDE October 24, 2020 Craig Peacock 4 The Espressif IoT Development Framework (esp-idf) is the official development platform for the ESP32 and ESP32-S series of SoCs from Fabless Semiconductor designer Espressif Systems. Espresif have developed the IDF eclipse plugin to make the setup and integration of the esp-idf with the eclipse IDE simple and relatively painless. Installation … Electronics Hardware Primer: The USB-C Connector July 16, 2020 Craig Peacock 0 Anyone who has used a USB Type-A plug will know the fact that it takes three attempts to successfully insert. The USB Type-C connector sets out to solve this life’s little annoyance. But it doesn’t just stop there, it also offers many other advantages: Reversible plug. No upstream/downstream facing connector. … Embedded Linux ANSI C Basic Lightweight NMEA Parser for GPS June 23, 2020 Craig Peacock 0 For a recent OBD2 (vehicle/fleet data-logging) project running on a Raspberry PI Zero, I needed access to GPS data – both position/speed and time. The Raspberry PI doesn’t include a Real Time Clock (RTC). Upon boot, it doesn’t know what the actual time it is, unless it has access to … CAN - Controller Area Network SWCAN Single Wire CAN Transceiver Breakout Board June 19, 2020 Craig Peacock 17 Single Wire CAN (SAE J2411) is commonly used in cost-sensitive Automotive applications where speed and cable length is not as onerous. It is also useful in applications were a traditional CAN differential pair is physically not possible. For example, on Type 2 Mennekes connectors used for Electric Vehicle (EV) charging, the … CAN - Controller Area Network Adding CAN to the BeagleBone (Black) February 10, 2020 Craig Peacock 4 The CAN bus (Controller Area Network) was originally designed by Bosch for the automotive market to connect ECUs (Engine/Electronic Control Units) together. Today, this robust communications bus is commonly found, not only in vehicles, but also on the factory floor in automation (e.g. CANOpen) and other applications such as PV solar inverter/battery Energy … CAN - Controller Area Network Example C SocketCAN Code January 31, 2020 Craig Peacock 7 Writing user space C code to talk to CAN devices via the Linux SocketCAN interface is relatively simple and efficient. SocketCAN uses the Berkeley socket API and hence is very similar to communicating with other network socket devices. Below is a simple guide to get you started reading, writing and … CAN - Controller Area Network Adding CAN to the Raspberry PI January 17, 2020 Craig Peacock 22 The CAN bus (Controller Area Network) was originally designed by Bosch for the automotive market to connect ECUs (Engine/Electronic Control Units) together. Today, this robust communications bus is commonly found, not only in vehicles, but also on the factory floor in automation (e.g. CANOpen) and other applications such as PV …...