Are you us g deep mode or continuous operating? How long have you been running? I’ve transitioned to 18650 batteries recovered from discarded laptop batteries.xnih13 wrote:I'm down to 896 on my current test off a single C battery, keep expecting it to die any day now!
Yes, need to have some means to make sure not to drop too low. I have nodes reporting to Node-Red with an alarm set for 3.4v. The node sends voltage with every transmission. charging boards are inexpensive and an 18650 will run a one minute scheduled report for months. Your C should do well also. I have access to many 18650’s.xnih13 wrote:using sleep code, similar to what was posted here: low-power-slave-and-master-code-t65.html
reading in temperature and sending to a base station every 72 or 80s.
Have 2 different boards running, both exact same code, one is down to 1.15V and the other is at 882 as of a few mins ago. As of noon today it was at 64 days.
I've thought about using old 18650's, but haven't wanted to put anything in place for charging them or making sure they don't over discharge and then risk damaging them. (think the bottom voltage is 3V?)