Arduino launched at the CES 2020 a new IoT Plattform – the Arduino Portenta H7.
H7’s main processor is a dual core unit made of a Cortex® M7 running at 480 MHz and a Cortex® M4 running at 240 MHz. The two cores communicate via a Remote Procedure Call mechanism that allows calling functions on the other processor seamlessly.
The onboard wireless module allows to simultaneously manage WiFi and Bluetooth® connectivity. The WiFi interface can be operated as an Access Point, as a Station or as a dual mode simultaneous AP/STA and can handle up to 65 Mbps transfer rate. Bluetooth® interface supports Bluetooth Classic and BLE.
Evaluation of the power consumption of an autonomous IoT device
The popular Arduino Uno micro-controller in combination with GSM/GPRS shields based on the SIM900 chip are quite popular as prototype platform for new developments or autonomous IoT systems. The main challenge to implement a true energy autonomous system is the considerable energy demand of this components if you use them out-of the-box. Data sheets and other supplier information give no or only limited information of the true power requirements.
An evaluation project from CADEMIS determined the energy requirements of a basic setup which might be a useful indication for the design of related IoT systems.
In order to determine the energy consumption a simple system setup was used to determine the current at a 12 Volt battery.
A control program implemented in the Arduino IDE switches between four different states:
1: GSM board OFF, Onboard LED ON
2: GSM board OFF, Onboard LED OFF
3: GSM board ON, Onboard LED OFF
4: GSM board ON, Onboard LED ON
Between the states a delay of 10 seconds was implemented in order to get a steady reading on the Ampere-meter.
Arduino Source Code:
The source code for Arduino IDE 1.6.13 to switch between the four states mentioned above:
Special remark on switching on the GSM Shield: When switching on the board (between state 2 and 3) the power consumption is between 70 mA and 220 mA for about 5 seconds. As mentioned in several posts in forums causes every switching operation a significant peak in current and power.
It is strongly recommended to switch off unused loads in order to reduce the power consumption by up almost 50% for a simple setup like this. This can double the operation-time between battery reloading or reduce the solar power requirements and costs.
Thanks to the girls and guys from Geeetech for publishing the basic information on how to control the SIM900 board:
We are excited to announce the upcoming release of the Cademis Weather Monitor. The original prototype was published two years ago at Instructables. After several design iterations it will be released as Open Source Solution on 1. January 2016.
Appealing design and simple to use gateway unit
Fits perfectly in any living room or kitchen
Connects to any enviromental sensor wireless via 868 MHz or direct via I2C
Easy Monitoring and Analytics over the Web
Open Source Electronic Design, MCAD, Firmware and Software
Over the coming weeks we will publish all design and manufacturing instructions which will allow you to build the Cademis Weather Monitor.
The Arduino Yún is the frist true IoT board from Arduino which gives you a real-time controller combined with a Linux environment with almost unlimited connection possibilities (Ethernet, WiFi, USB)
It is the best tool to monitor and control your devices, and here you find a few instructions to get you up and running.
Upgrade to latest Linux (optional)
If you are not sure if you have the latest Linux version on your Yun you will need to upgrade. To upgrade or reinstall the OpenWrt-Yun image on your Yún, you’ll need to download the zip file from the download page. Once you’ve unpacked the file, move the binary image file to the root folder of a microSD card and insert the card into the Yún.
Next step is to connect the Arduino Yun to your wireless network:
Connect to your WIFI NEtwork (WLAN)
After WLAN reset and when you first power on the Yún, it will create a WiFi network called ArduinoYun-XXXXXXXXXXXX. Connect your computer to this network!
Once you have obtained an IP address, open a web browser, and enter http://arduino.local or 192.168.240.1 in the address bar. After a few moments, a web page will appear asking for a password. Enter “arduino” and click the Log In button.
You will find a page with some diagnostic information about the current network connections. The first is your WiFi interface, the second is your ethernet connection. Press the Configuration button to proceed.
On the new page, you will configure your Yún, giving it a unique name and identifying what network you want to connect to.
In the Yún NAME field, give your Arduino a unique name. This is important if you plan to use more than one Yun on your network in the future. So if you name it yun123 you will need to connect to http://yun123.local the next time to want to configure the wifi settings.
Choose a password of 8 or more characters for your Arduino. If you leave this field blank, the system retains the default password of arduino
If you wish, you can set the timezone and country. It is recommended to set these options as it may help connecting to local WiFi networks. Setting the local timezone also selects the country’s regulatory domain.
Enter the name of the WiFi network you wish to connect to.
Select the security type, and enter the password.
When you press the Configure & Restart button, the Arduino will reset itself and join the specified network. The Arduino network will shut down after a few moments.
You can now join the network you assigned to the Yún.