Working on next #Kickstarter
column for #raspberrypigeek
magazine. Work in progress. Will publish blogs next week, but have to get the column out first!
This is a wireless data transmission system with an #Arduino
connectors at each end. Tested to 200 meters so far. Should go to 600 meters but definitely had the wrong shoes on to go out in the field. Still pulling out stickers out of the shoes.
Has DS3231 real time clock. Can use DS3231 Alarms to wake up device periodically with Interrupt. Have the quiescent current down to 2.8mA (started at 75mA!) and average current to about 6mA when transmitting every 30 seconds.
The two #raspberrypi
computers are measuring and graphing currents and running a reciever on the right. Measuring all the solar conditions too with #SunAirPlus
Using the USB PowerControl in the top middle to shut the computer down when the voltage is to low and then bring it up when the battery has recovered. Just connecting the processor to the power supply caused it to lock up, which can happen when your power is marginal, (destroys SD Cards on Raspberry Pis) even on Arduino devices.
Note on graph the further drop of quiescent current when I took the LED off the DS3231 RTC Board.