We do not minimize the total length of the DQ line but we rather have a little longer (twice) total topology weight and minimize the distance of the stubs to achieve linear topology. So the length of the stub is about 1cm max.

https://www.maximintegrated.com/en/app-notes/index.mvp/id/148

thanks for quick answer and guidance
After fast look into documentation, I have found that for all DI for external power source I have to switch all JP2 to JP5 to label side

JP1 has been mounted, sorry was faulty information.
But finaly i found the problem: 5V GND was not connected
to the UniPI power plug, only on the mini USB.
Thank's for you help.

best regards
Michael

I had made a mistake and the notes on the wiki do work for me (I found I didn't need the entry in /etc/modules though). Anyway an updated script that works for me on a clean install of Jessie is below

#!/bin/bash # UniPi driver setup if [ "$EUID" -ne 0 ] then echo "This script must be run as root" exit fi echo Backup files cp /boot/config.txt /boot/config.txt.bak echo Enabling I2C bus... if ! grep -q '^dtparam=i2c_arm=on' /boot/config.txt then echo 'dtparam=i2c_arm=on' >> /boot/config.txt fi if ! grep -q '^dtparam=i2c_baudrate=400000' /boot/config.txt then echo 'dtparam=i2c_baudrate=400000' >> /boot/config.txt fi echo Enabling the RTC chip... if ! grep -q '^dtoverlay=i2c-rtc,mcp7941x' /boot/config.txt then echo 'dtoverlay=i2c-rtc,mcp7941x' >> /boot/config.txt fi echo Getting i2c development tools apt-get install -y i2c-tools if ! grep -q '^i2c-dev' /etc/modules then echo 'i2c-dev' >> /etc/modules fi echo Removing fake-hwclock... apt-get purge -y fake-hwclock update-rc.d -f fake-hwclock remove apt-get autoremove -y sed -i '/^if [ -e \/run\/systemd\/system/,/^fi/s/^/#/' /lib/udev/hwclock-set echo ' ' echo 'UniPi installed.' echo ' ' echo '!!! REBOOT IS REQUIRED !!!' echo ' ' read -p "Is it OK to reboot now? [y/N] " -n 1 -r echo ' ' if [[ $REPLY =~ ^[Yy]$ ]] then reboot else echo 'Reboot to finish configuring drivers' fi echo ' '

You are right, pilight was still running ! Thank you

Thank you. Sorry apparently I didn't search well enough on my topic. I'll continue this thread over there.

Using different PSU is described in technical documentation, see https://files.unipi.technology/index.ph ... niPi%201.1

Depending on what DI you want to use with the other PSU you will have to switch JP2 and JP3 at minimum.

I thought of bridge rectifier, but I would need 8 of them. I found a gang of eight 24vac relays about the size of the ones on the UniPi, but I didn't think that was elegant and power efficient.

Hello,

solid state relays are ideal for switching LED lights, see the datasheets below for more information. If you use adequate cooling for the load it will withstand for years. I would not much bother with the minimal load, but check the datasheet.

Yest SSRs are great because of switching at zero.

http://www.sharp-world.com/products/dev ... 2s02_e.pdf
https://www.omron.com/ecb/products/pdf/en-g5q.pdf

Ok
Many thanks

Hello Chris,

the inputs are designed to work in the range of 5-24V DC. This means you can use both. But the 5V cannot guarantee 100% working on long cables because of voltage drop. So I suggest using the internal 12V.

(The third option is using external 12-24V power supply)

Hello, I have created a simple wiki page. See http://unipi.technology/wiki/Using_Analog_Output

Let me know if anything is missing or not clear and I will fix it.