Try GOLD - Free
Smart Home Gateway with PHPOC Black Part 1: Temperature and Humidity Server
Circuit Cellar
|July 2025
The PHP on Chip Black is a programmable IoT MCU board. In this article series, Raul uses it to develop a smart home gateway prototype.
In Part 1, he focuses on its integrated web and WebSocket server capabilities. By leveraging the PHPOC platform's PHP-inspired language and robust IoT features, he creates a basic server that interfaces with an AHT10 sensor to monitor temperature and humidity, displaying real-time data on a dynamic webpage.
PHP on Chip (PHPOC) is a PHP-inspired dialect tailored for embedded systems. It supports a wide range of network protocols, incorporating robust security features such as authentication and encryption algorithms. The board comes with an integrated web server and WebSocket server, enabling the creation of real-time IoT solutions for monitoring and control. It offers versatile interfacing options for external sensors and actuators through digital input/ output (I/O), SPI, I2C, UART, and analog inputs, complemented by onboard timers/ counters and a real-time clock.
The gateway we will implement connects to local sensors and actuators, while also linking via Wi-Fi to remote nodes, enhancing its monitoring and control reach. It hosts a web-based user interface to interact with the system.
The PHPOC Black is ideal for web developers familiar with PHP but new to embedded programming, as well as for embedded engineers and hobbyists who are eager to explore PHP in a microcontroller context.
In this article series, I'll demonstrate the development of a smart home gateway prototype using the PHPOC Black. Through this project, I'll introduce the PHPOC language along with HTML and JavaScript to enthusiasts in the latter group, even if they lack prior web server programming experience. To follow along, you'll need basic experience with embedded systems development in C/C++, using Arduino, PIC, ARM, or similar platforms.
THE PHPOC PLATFORM
This story is from the July 2025 edition of Circuit Cellar.
Subscribe to Magzter GOLD to access thousands of curated premium stories, and 10,000+ magazines and newspapers.
Already a subscriber? Sign In
MORE STORIES FROM Circuit Cellar
Circuit Cellar
Vishay Intertechnology Automotive-Grade Optocouplers Deliver High Isolation Voltage Ratings and Distance for EVs and Solar Inverters
Vishay Intertechnology, Inc. introduced two new Automotive-Grade optocouplers with phototransistor output in a widebody package featuring a comparative tracking index (CTI) of 600.
1 min
July 2026
Circuit Cellar
WWVB Timecode Generator A Tool for Testing Radio-Controlled Clocks
In this article, Robert describes how he built a timecode generator that provides simulated code from WWVB, a radio station operated by the National Institute of Standards and Technology, which is used to synchronize millions of radio-controlled clocks.
16 mins
July 2026
Circuit Cellar
MCUs at the Heart of the Edge Modern MCUs Go Beyond Simple Process Control
Microcontroller Units (MCUs) are the power at the heart of modern embedded systems.
2 mins
July 2026
Circuit Cellar
650V ICeGaN Device for Automotive Applications from CGD Helps Increase EV Range
Cambridge GaN Devices (CGD) has developed a 650V GaN IC for automotive applications that addresses automakers' desires to improve inverter efficiency.
1 min
July 2026
Circuit Cellar
Blues Latest IoT Modules Notecard for Skylo and Notecarrier CX
Satellite comms for IoT projects may seem the domain of enterprise customers, but new modules from Blues can bring satellites within reach even for small professional and research projects.
22 mins
July 2026
Circuit Cellar
Rust: An Embedded Lightning Rod Nothing Is Quite as It Seems
Linus Torvald’s release of Linux 7.0 announced the finalization of Rust-related projects in the kernel: From now on, the programming language is to be considered a first-class member of Linux.
10 mins
July 2026
Circuit Cellar
PLS' Debug and Trace Tool UDE Supports ST's Stellar P3E Automotive Microcontroller
The debug, trace, and test tool UDE Universal Debug Engine from PLS Programmierbare Logik & Systeme, has expanded its support to encompass the Stellar P3E.
2 mins
July 2026
Circuit Cellar
The Tireless Intern: LLM Coding Agents for Embedded Work Using AI Speeds Security Tooling
This article discusses a case study of using a large language model (LLM) to develop a tool for embedded security, that would have otherwise taken several weeks (or months) of effort in a few days.
10 mins
July 2026
Circuit Cellar
IoT Infrastructure: On-Premises Deployment or Cloud Solution?
Designing an IoT system is not only about sensors and dashboards.
5 mins
July 2026
Circuit Cellar
Signal-to-Noise Ratio for Voice Activity Detection Devices
Users needs to be able to give AI glasses voice commands and be sure the device is only picking up their speech, not other sounds.
4 mins
July 2026
Listen
Translate
Change font size
