Open Source Hardware ESP32-POE board now has new version with 3000VDC galvanic insulation

Published: Wed, 20 Feb 2019 14:44 | Comments: 0
Open Source Hardware ESP32-POE board now has new version with 3000VDC galvanic insulation

ESP32-POE is one of our best selling boards, it’s low cost less than EUR 18 in single quantity and allow you to make IoT sensor network with existing Ethernet POE infrastructure. The end node can provide up to 4W combined on +5V and +3.3V output to external components and circuits which is more than enough […]

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LoRa experiments in Plovdiv

Published: Wed, 20 Feb 2019 10:59 | Comments: 5
LoRa experiments in Plovdiv

We are working for some months on OSHW LoRa nodes and our goal is to bring up free to use for non for profit Smart City solutions LoRaWAN network which to cover city of Plovdiv . Yesterday we installed our First LoRaWAN Gateway made with T2-OLinuXino-LIME2-e16GBs16MB + RK831 + +6dBi rod antenna on Rilon Building […]

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C awesomeness (not)

Published: Wed, 20 Feb 2019 09:58 | Comments: 0
C awesomeness (not)

Few days ago I was asked question what would be the output of this code: #include <stdio.h> int main() { int a = 5; printf("%d %d %d %d\n",a++,a++,++a,a++); return 0; } Nothing special, right? But C standard do not specify how printf evaluates it’s parameters, so it’s left up to the C compiler and here […]

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How to use A20 CAN interface with the A20 universal Armbian image for OLinuXino

Published: Tue, 19 Feb 2019 16:42 | Comments: 1
How to use A20 CAN interface with the A20 universal Armbian image for OLinuXino

To use A20 CAN interface you need A20-OLinuXino board and A20-CAN board. Then you have to install the armbian A20 CAN overlay: Download the dts file from: https://github.com/armbian/sunxi-DT-overlays/blob/master/sun7i-a20/sun7i-a20-can.dts Backup your SD card where the Linux image for OLinuXino is. Copy to the SD card the downloaded file. Insert the SD card into you A20-Olinuxino. Power […]

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