https://bi4wms.github.io/BI4WMS LabsA minimal, responsive and feature-rich Jekyll theme for technical writing. 2026-05-31T02:25:59+00:00 BI4WMS https://bi4wms.github.io/ Jekyll © 2026 BI4WMS /assets/img/favicons/favicon.ico /assets/img/favicons/favicon-96x96.png LoRa Flood Sensor Development Series - Part 3 PCB Placement Guide2026-05-22T22:10:10+00:00 2026-05-31T02:25:38+00:00 https://bi4wms.github.io/posts/LoRa-Flood-Sensor-Development-Series-part3-PCB-Placement-Guide/ BI4WMS LoRa Flood Sensor Development Series – PCB Placement Guide Design Overview We are using an existing enclosure for a shell-fit PCBA design. Enclosure outer diameter: 50mm Due to waterproof design, the internal space is quite limited. The other side must accommodate a coin cell battery, therefore only single-sided component placement is allowed. Step 1: Determine PCBA Outline ... LoRa Flood Sensor Development Series - Part 2 Schematic Design and Component Selection2026-05-15T22:10:10+00:00 2026-05-16T04:16:30+00:00 https://bi4wms.github.io/posts/LoRa-Flood-Sensor-Development-Series-part2-Schematic-Design-and-Component-Selection/ BI4WMS LoRa Flood Sensor Development Series – Complete Schematic Design Guide Building a reliable, ultra-low-power water leak/immersion detector with LoRa connectivity? This project uses the STM32G030K8T6 MCU and SX1278 LoRa module for excellent Arduino compatibility, long-range transmission, and minimal power consumption. In this guide, we share the full hardware design using the simplest electrode... LoRa Flood Sensor Development Series - Part 1 Water Immersion Sensor System Solution2026-05-09T22:10:10+00:00 2026-05-09T22:10:10+00:00 https://bi4wms.github.io/posts/LoRa-Flood-Sensor-Development-Series-Part1/ BI4WMS LoRa Flood Sensor Development Series – Water Immersion Sensor System Solution Recently, I evaluated a water immersion sensor system solution. Here is a quick summary of the proposed design. 1. User Requirements Design a wearable water immersion alarm device. The key requirements are as follows: The device must be wearable, powered by a coin cell battery, and support standby operation for... SimpleFOC Integrated Board from Zero to One - Part 42026-05-04T08:10:10+00:00 2026-05-04T10:12:42+00:00 https://bi4wms.github.io/posts/Interpreting-the-code-and-add-heartbeat-function/ BI4WMS SimpleFOC Integrated Board Hardware Practice: From Zero to One (4) – Interpreting the Code and add heartbeat function Interpreting the Code This article mainly explains the code. The example is based on the official SimpleFOC example: full_control_serial.ino. #include <SimpleFOC.h> //#define USE_HSI // magnetic sensor instance - SPI //MagneticSensorSPI sensor = MagneticSensorSPI(AS5147... SimpleFOC Integrated Board from Zero to One - Part 32026-04-21T22:10:10+00:00 2026-04-21T22:10:10+00:00 https://bi4wms.github.io/posts/Power-Up-and-SimpleFOC-Software-Setup-Guide/ BI4WMS SimpleFOC Integrated Board Hardware Practice: From Zero to One (3) – Power-Up and SimpleFOC Software Setup Guide BI4WMS FOC Driver Board - Power-Up and SimpleFOC Software Setup Guide Board Preparation Solder the components onto the PCB according to the IBOM (Interactive Bill of Materials). Key components should be soldered first. Use a multimeter to check the power rails for any short ci...