rf433 News - CNX Software - Embedded Systems News

September 10, 2024September 8, 2024 by Debashis Das - No Comments

Mayhem v2 expansion for Flipper Zero adds Wi-Fi, BLE, camera, microSD card slot, and NRF24 or CC1101 radio support

Erwin Ried‘s Mayhem v2 is an all-in-one ESP32 and NRF24L01-based expansion board designed for Flipper Zero. This board adds Bluetooth and Wi-Fi through an ESP32-S module, features 2MP camera with flashlight, a microSD card slot, and support for either an NRF24L01 module (for sniffing and mousejacking) or a CC1101 module (for external radio communication). These features make this Flipper Zero add-on board useful for WiFi and Bluetooth penetration testing, motion detection, QR code reading, and as a nanny cam with remote access. Previously we have written about similar expansion boards like the Flipper Zero ESP8266 Deauther which adds de-authentication capabilities and the Flipper Add-On CANBus which can be used to sniff, send, and log CAN bus packets directly from the Flipper Zero. Feel free to check those out if you are interested in those tools. Mayhem v2 Flipper Zero add-on board specification Wireless Module – ESP32-S WiFi 802.11 b/g/n + […]

January 14, 2023January 14, 2023 by Jean-Luc Aufranc (CNXSoft) - 9 Comments

433 MHz is not dead! Using an ESP32 board with LoRa module to talk to 433 MHz sensors

CNXSoft: This is a guest post by Florian Robert (1technophile) of the OpenMQTTGateway project about using a 433 MHz LoRa transceiver on an ESP32 board for home automation, specifically to talk to 433 MHz sensors Everyone is talking about Matter, Bluetooth, Zigbee, and Zwave, but before these complex communication technologies, we had one simple, robust one that our sensors and devices used to leverage: 433MHz. It may be too simplistic to talk about 433 MHz as a technology as there are different and various usages of this frequency. You can find it being used in numerous devices around your home, from your outdoor temperature sensors, and security sensors to the tire pressure sensors in your car. If we want to be specific, we can talk about the different radio frequencies (433 MHz, 915MHz, 868MHz, 315MHz, or 350MHz) and signal modulations OOK, ASK, FSK that we encounter behind the keyword 433MHz. […]

May 5, 2020 by Jean-Luc Aufranc (CNXSoft) - 6 Comments

Sonoff 4CHR3 is a 4-gang Wi-Fi Smart Switch with optional RF433 Connectivity

ITEAD Studio introduced Sonoff 4CH 4-gang WiFi + RF switch in 2017 with a DIN rail enclosure, compatible with eWelink Android/iOS app, and offering three modes of operations selectable from physical switches on the unit: Self-locking mode – Each relay can be turn on and off independently. Interlock mode – Only one of the relay can be turned on at a given time. For example if R1 is on, and your press R2 to turn it on, R1 will automatically turn off Inching mode – A button press on the unit, mobile app, or RF/WiFi remote control will turn on the relay for X seconds as defined by K6 “delay” switch within a 0.5 to 3600 seconds range. The company has now launched the similar SONOFF 4CHR3 4-gang WiFi switch and 4CHPROR3 model that adds 433MHz connectivity, with the main difference again the previous generation being the ability to select […]

December 6, 2019December 6, 2019 by Jean-Luc Aufranc (CNXSoft) - 5 Comments

$7 Sonoff D1 Smart Dimmer Switch Supports Mobile App, RF433 Remote, and Voice Assistants

Sonoff D1 Smart Dimmer Switch & RF433 Remote

ITEAD Studio Sonoff is a family of WiFi or/and 433 MHz RF connected smart home switches, sockets, light bulbs or other products for home automation. They are usually based on ESP8266 WiSoC and while the pre-loaded firmware works with eWelink Android/iOS app and popular voice assistant, it’s also possible to load open-source firmware such as Sonoff-Tasmota or ESPurna to add MQTT and other protocols in order to integrate those with home automation solution such as Domoticz, or something control those from your web browser. The company has now launched another Sonoff device, namely Sonoff D1 smart dimmer switch which – as its name implies – will allow you to dim incandescent and dimmable LED lights. Sonoff D1 smart dimmer switch specifications: Connectivity – RF433 and 802.11b/g/n WiFi 4 Max Current – 1A Max Power – 400W for Incandescent lamp, and 150W for LED light Power Supply – 110V-230V AC input […]

September 12, 2017September 25, 2017 by Karl Johnson - No Comments

Review of Sonoff RF Bridge, Sonoff 4ch Pro, and Sonoff POW with Sonoff-Tasmota Firmware

Karl here. Today we are going to look at 2 new and one older Sonoff devices. Sonoff RF Bridge – $9.90 433MHz RF to WiFi Bridge Sonoff 4ch Pro – 4 Gang WiFi RF Smart Switch Sonoff POW – Wireless switch with power metering capabilities I spent very little time with the stock firmware on the device. I don’t like the fact that an Internet connection is needed, and I am not in control. As of the time of this writing I found the Ewelink was not configurable enough to meet my needs. There is one feature that is really nice that I could easily see keeping stock firmware. It is the Alexa Skill. It worked. I am also currently reviewing Vobot Smart Alarm Clock with Alexa integration and had no trouble controlling the Sonoff devices with Alexa. But unfortunately I am lazy and want everything automatic so I can’t […]

June 14, 2017 by Jean-Luc Aufranc (CNXSoft) - 10 Comments

$23 Sonoff 4CH Pro 4-Channels WiFi & RF Switch Ships in a DIN Rail Enclosure

ITEAD Studio’s Sonoff family is a collection of really useful and inexpensive home automation devices which have been featured multiple times on CNX Software with either to stock firmware and eWelink app, or open source firmware developed by the community. I’m using a Sonoff TH16 to control a water pump, a Sonoff Pow to monitor my office’s power consumption, and Karl used some Sonoff switches to control his lights at home. The company has now launched Sonoff 4CH Pro with 4 relays that can be controlled with buttons on the unit, WiFi, or RF remote controls, and comes in a DIN Rail enclosure. Sonoff 4CH Pro switch specifications: Connectivity – ESP8266 WiFi module and 433 MHz receiver Relays – 4x HUIKE 230V/10A relays (max 2200W per relays) with NC and NO connection Configuration – K5 & S6 switch for mode selection; K6 switch for time selection (0.5 to 4s) Misc […]

May 23, 2017May 23, 2017 by Jean-Luc Aufranc (CNXSoft) - 5 Comments

This $8 USB Transceiver Can Add 433 MHz Device Support to your Home Automation Gateway

With the advent of WiFi and Bluetooth IoT, 433 MHz devices are becoming less popular but are still used for doorbells, motions sensors, windows/door sensors, etc… If you have such devices at home, one way to integrate those into your home automation system is to use an ESP8266 WiFi to 433 Mhz bridge between your gateway and 433 MHz capable products. However, you don’t even need the middleman if you use a USB 433 MHz transceiver connected directly to the gateway. Nathan Chantrell found such USB dongle on Banggood for about $8, and managed to make it work with his Debian Gateway using Node-RED. 433 MHz USB dongle and features: Connectivity 433 MHz transceiver Range – up to 30 to 100 meters (Line of Sight) Tx and Rx for PT2262, PT2260, PT2264, PT2240, EV1527, HS2303-PT codes Can transmit multiple signals independently Control interface – Serial over USB @ 9600 bps […]

April 4, 2017April 4, 2017 by Jean-Luc Aufranc (CNXSoft) - 1 Comment

Solar Powered CAREUD U800WF Monitoring System Checks Your Car’s Tires Pressure

Every few months, we inflate (or deflate) our car tires at the gas station to match the pressures for front and rear tires given by the manufacturer. But if you want to make sure the pressures are always at their optimal levels, or close to it CAREUD U800WF pressure monitoring system might be a useful little gadget. The monitor that you can place on your dashboard comes with the following specifications: Display showing pressure with +/- 1.5 PSI accuracy and temperature with +/- 3 °C accuracy for all four tires; data updated every 3 seconds. Connectivity – 433.92 MHz RF Power Supply Solar Panel 5V via micro USB port 900 mAh Li-ion Battery Temperature Range – Storage: -30 to 85 °C; operating: -20 to 80 °C IP Rating – IP5K4K (The “K” in the ingress protection rating means it complies with ISO 20653:2013 Road Vehicles-Degrees of protection) Dimensions – 76 […]