So we've developed an IoT sensor POC that we're going to pilot shortly. It's a small multitech mDot LoRa board with a ultrasonic distance ranging sensor. It will take liquid level measurements daily and send them to our backoffice solution. 99% of the time it will be in sleep mode. The board itself only draws ~40ua in sleep, but the ultrasonic sensor (a maxbotix 7389) is drawing 1.9mA in sleep. So with a 2500mAh battery, the expected life is not the 3-4 years we are trying to get, but rather 41 days.
The two of us working on this are both software guys, not hardware, and we're fumbling around trying to figure out a way to cut power to the sensor. We're looking at using an N-Channel mosfet but i wanted to see if anyone on this forum could provide some guidance.
Thanks in advance
Steve
The two of us working on this are both software guys, not hardware, and we're fumbling around trying to figure out a way to cut power to the sensor. We're looking at using an N-Channel mosfet but i wanted to see if anyone on this forum could provide some guidance.
Thanks in advance
Steve