Posts Tagged ‘gsm’

Sonoff G1 AC Powered Smart Power Switch Works Over 2G GSM/GPRS

July 22nd, 2017 1 comment

Today, I’ve searched for AC powered wireless switched similar to Sonoff devices, but with ESP32 instead in order to get WiFi and Bluetooth, since the latter is better to use with a battery powered buttons. I did find a DC powered board, but no AC powered ones yet. However, as I visited ITEAD website to check if they had anything of the sort, I discovered they had a new model called Sonoff G1, similar to Sonoff TH16, but instead of using WiFi, you can use 2G GSM/GPRS to control the switch remotely.

Sonoff G1 specifications:

  • Wireless Module – ST86 quad band GSM/GPRS module
  • GSM/GPRS connectivity
    • GSM850, EGSM900, DCS1800 and PCS1900 MHz support
    • GPRS multi-slot class 10, GPRS mobile station class B
    • 1.8V, 3V  SIM card slot
    • Transmit power: Class 4 (2W): GSM850, EGSM900; Class 1 (1W): DCS1800, PCS1900
  • Relay – Up to 16A (3000 Watts max)
  • Terminals – 6 terminals for mains and load’s ground, live and neutral signals. 90~250V AC (50/60Hz) input supported
  • Misc – LEDs for power and connection status, button for manual on/off
  • Standby Power Consumption – 1.0 mW
  • Dimensions – 114 x 52 x 32mm
  • Weight – 100 grams
  • Temperature range – Operating -40°C to +80°C, but recommended is 0 to 40°C… So go figure.

Such system could be useful if you need to control devices in remote locations, as long as you are in a zone not affected by 2G sunset like China and Europe.

You’ll need to open the device to insert your own SIM card, install the usual eWelink app, scan a QR code on the device to initialize it. Once this is done, you can turn it on/off, set timers, integrate it into scenes, and share it with other permitted users. Basically anything you can do with the WiFi model, including Amzon Alexa & (soon) Google Home support, but it adds checking the remaining balance. This is explained in more details in the Wiki and links there. There’s also Sonoff G2 model for mainland China with a built-in China Mobile SIM card. You’ll have to happy with using eWelink Android/iOS app, as that model is unlikely to hackable with a custom firmware.

ITEAD sells Sonoff G1 for $19.90 plus shipping.

Wio GPS is a $40 Grove & Arduino Compatible Bluetooth 3.0 + GSM/GPRS + GPS Tracker Board

April 21st, 2017 2 comments

After Wio Link and Wio Node boards, Seeed Studio has added a new board to their Wio (Wireless Input Output) family with Wio GPS board based on Microchip SAMD21 Cortex M0+ MCU for Arduino compatibility, and Mediatek MT2503 ARM7 processor for GPS, Bluetooth 3.0, and 2G (GPRS) connectivity.

Click to Enlarge

Wio GPS board specifications:

  • MCU – Microchip ATSAMD21G18A-MU ARM Cortex M0+ MCU @ 48 MHz with 256KB flash, 32KB SRAM
  • Wireless SoC – Mediatek MT2503 ARM7EJ-S processor @ 260 MHz
  • Storage – micro SD slot (shared with nano SIM slot)
  • Connectivity (built-in MT2503 in Quectel MC20 module)
    • Bluetooth 2.1 + EDR, 3.0 with SPP Profile and HFP-AG Profile; u.FL connector for external antenna
    • Quad band 2G GSM/GPRS  with u.FL connector for external antenna and nano SIM card slot
    • GNSS – GPS + BeiDou + QZSS with u.FL connector for external antenna
  • Audio – Speaker footprint (+/-), 3.5mm AUX jack with mic and stereo audio
  • Expansion – 6x Grove Connectors (2x Digital, 2x Analog, 1x UART, 1x I2C)
  • USB – 1x micro USB port for power and firmware update
  • Misc – RGB LED, GSM power button, reset button
  • Power Supply – 5V via micro USB port, 2-pin JST 1.0 header for battery
  • Dimensions – 54.7mm x 48.2mm
  • Weight – 45 grams; antennas add 9 grams

While you can already do much of the things achieved with Wio GPS using an Arduino board, and corresponding GPRS/GPS shields, Seeed Studio’s board offers a more compact solution, and access to over 180 modules via the grove connectors. The board can be programmed with the Arduino IDE, and in due time a Wiki will be setup showing how to get started with the board.

Wio GPS Board with tis three antennas (GPS, Bt, GSM) is available for pre-order for $39.90 on Seeed Studio, and shipping is scheduled for June 1st. The company also plans to released an 4G /LTE version in Q3 2017.

Shenzhen Alpha M009 Smartwatch is Powered by Mediatek MT2503 SoC with Integrated Bluetooth, GSM Modem, and GPS

May 26th, 2016 7 comments

Mediatek MT2502 “Aster” SoC for wearables and IoT was released in 2014 with an ARM7 MCU, built-in Bluetooth, PMIC, and GSM/GPRS modem, and support for external WiFi and GPS chips. The upcoming MT2503 integrates functionality even further as GPS is now embedded inside the SoC, and Shenzhen Alpha Telecom Technology demonstrated their  M009 smartwatch based on the latest Mediatek SoC at CES Asia 2016 in Shanghai.

Mediatek_MT2503_SmartwatchM009 smartwatch specifications:

  • SoC – Mediatek MT2503 ARM7 processor with GSM/GPRS modem, Bluetooth 3.0 + EDR 2.1, GPS (MT3333), PMIC
  • Display – 1.22″ or 1.3″ 240×240 resolution TFT display
  • Cellular Connectivity – SIM card
  • Sensors – HRM, pressure sensor
  • Misc – 2x buttons
  • Dimensions – 36 x 32 x 11 mm

There will be two version of the processor MT2503A and MT2503D with the former supporting external serial flash.


Mediatek MT2503 Block Diagram (Click to Enlarge)

If you’d like to integrate a ready to use module in your design, ATS Link provides W120 module with the processor and all required extra components.

The video in Italian below shows Shenzhen Alpha’s M009 smartwatch, as well as another model – H009 – based on Rockchip RK6321 processor, which I previously thought to be canceled, as it was born from the now defunct Intel and Rockchip partnership.

Via Notebook Italia

RTU-5025 GSM Relay Controller Supports Up to 64 Phone Numbers

April 17th, 2016 4 comments

We’ve already seem boxed WiFi and Bluetooth wireless relays that can be used to turn on and off appliances using a smartphones or web applications, but I’ve just been made aware that GSM relay controllers such as RTU 5025 could also be a good options since they allow for authentication using the mobile number, can be used with any phone, not only smartphones, and don’t cost anything to operate, beside the eventual maintenance cost of the SIM card inside the device, since the relay does not actually answer calls. It can also send an SMS to the owner each time the relay is activated, in which case the cost of SMS might have to be considered.

GSM_Relay_ControllerRTU 5025 specifications and key features:

  • Connectivity – GSM PHASE 2/2+@ 850/900/1800/1900 MHz with SIM card slot + GSM antenna
  • Output Relay – 3A/240V
  • Rated Voltage – 12V/1A
  • Working Temperature – -10 to 60 Degree Celsius
  • Storage Temperature – -20 to 60 Degree Celsius
  • Relative Humidity – 10 to 90% (No condensation)
  • Support up to 64 authorized phone numbers can be configured by SMS
  • Terminal Block –  01+/01- to motor, Siren, IN1/IN2 to sensor
  • Dimensions – 107 x 119 x 24 mm (L x W x D)
  • Weight – 163g

This product is mainly used as a gate opener which explains the siren and sensor pins, but it could be used to control other machinery remotely, and other optional sensors sold with the device include PIR sensor,  glass break sensor, magnetic window sensor, temperature sensor, information beam fence, and vibration sensor.

Typical Connection to Open Gate

Typical Connection to Open Gate

The user manual for RTU-5025 (different enclosure) shows how to set the password, add users, i.e. mobile numbers, enable/disable the alarm triggered by the sensor pins, relay close time, etc… using SMS commands.

RTU 5025 is sold for $44.72 on Chinavasion, but you can also purchase it, or similar models, on Aliexpress, GearBest, eBay, etc… Again bear in mind that 2G networks are or will be phased out in many countries, and you may consider the 3G version instead, selling for $85 on Aliexpress.

Thanks to Onebir for the tip

Categories: Hardware Tags: 3G, automation, gsm

BPI-GSM Arduino Compatible Board Integrates a GSM & GPS Module, Sensors and an OLED Display

April 7th, 2016 4 comments

Banana Pi team has come up with another board, but this time it does not run Linux or Android, as they’ve made an Arduino compatible board called BPI-GSM based on Atmel ATmega2560 MCU with a light sensor, DHT22 temperature and humidity sensor, and a GSM/GRPS & GPS module powered by a LiPo battery.

BPI-GSMBPI-GSM board specifications:

  • MCU – Atmel ATmega2560 8-bit AVR MCU @ 16 MHz with 256 KB flash, 8KB SRAM, 4KB EEPROM
  • Connectivity – Simcom SIM808 GSM, GPRS, and GPS module + SIM card slot +
  • Sensors – DHT22 temperature and humidity sensor, light sensor
  • Display – OLED display
  • Expansion headers – 54x digital I/O (including 14x PWM), 16x analog input, 4x UART. Max DC current per I/O: 40 mA.
  • Misc – Reset button, LEDs
  • Power Supply
    • 5V via micro USB port
    • 3.7V LiPo battery (2,500 mAh battery included in kit)
  • Dimensions – TBD
Click to Enlarge

Click to Enlarge

The board can be programmed in the Arduino IDE by selecting Arduino Mega board. SIM808 modem is controlled with AT commands so that might not be the most programmer friendly board there is. You can find limited documentation for the board on Bear in mind that several countries have or are going to phase out 2G networks, so the GSM/GPRS connectivity may not work for long depending where you live.

The kit which includes the board, the OLED display and 2,500 mAh battery sells for $64 on Aliexpress.

RePhone Kit Create is a DIY Phone and Cellular Development Kit (Crowdfunding)

September 23rd, 2015 2 comments

Seeed Studio has design a modular and open source phone it calls RePhone Kit Create. The kit allows you, or/and your kid(s), to assemble their own phone based on building blocks including a 2G or 3G core module, a touchscreen display module, an audio module, and pre-cut, seawable, washable, and easily drawable Kraft paper to make the case. The kit can also be used for IoT applications using cellular and Bluetooth connectivity, and extra Xadow modules GPS, NFC, motion sensors, camera and more..

Two cellular “core” module can be used:

  • RePhone GSM + BLE module with the “world’s smallest System-on-Chip (SOC) for Wearables and Internet Of Things”, GSM, GPRS and Bluetooth 2.1 and 4.0 support.
  • RePhone Core Module 3G with a “powerful microcontroller”,a standard Xadow interface (USB, GPIO, I2C, SPI, UART, EINT), support for speaker, two microphones and a headset, a Nano SIM, and support for HSPA/WCDMA:850/1900 and GPRS/EDGE:850/1900. Voltage: 3.3 to 4.2V. Please note that the 3G module does not support Bluetooth.

The company has not released the full specs and documentation yet for the modules, but this should be done by October.

Up to eight modules are included with the rewards: Xadow 1.54″ Touchscreen and Xadow Audio included in RePhone Kit Create, as well as Xadow Basic Sensors, Xadow GPS v2 , Xadow NFC v2,  Xadow LED 5×7, Xadow Duino, and/or Xadow GSM Breakout in other rewards. A 520 mAh battery, and relevant FPC cables are also included.

Assembly Instructions

Assembly Instructions

The default firmware allows you to make and receive calls, send message, and play music, but the phone kit can also be programmed with the Arduino IDE, as well as Lua and Javascript thanks to an SDK based on Eclipse IDE for C/C++. IFTTT is supported for home automation, and you can control its behavior it using your smartphone. Seeed Studio also claims the kit is compatible with Pebble Time, but details are sparse, except for a “RePhone Strap Kit for Pebble” that includes an adapter, GPS and NFC modules, a battery, and structural support.RePhone_Pebble_Time RePhone project launched today on Kickstarter, and so far, it raised about $45,000 out of its $50,000 target. A $12 pledged should get you the GSM + BLE core module, $29 the 3G module, and $45 the RePhone Kit Create. There are also various other kits with core and Xadow modules for $39 and up. Shipping is not included, and delivery is scheduled for January or February 2016 depending on the perks. If you don’t feel like participating to a crowdfunding campaign, the RePhone will be sold on Seeed Studio Bazaar next year.