Basic question about driving the reset pin on an RN-42
#1
Posted 16 December 2011 - 12:43 AM
#2
Posted 16 December 2011 - 04:43 AM
When I use a jumper to manually and momentarily connect RESET to ground on the Netduino, I get the disconnect/reset behavior I want from the RN-42. I want to drive the same behavior from my C# code. If I permanently connect the RN-42 RESET pin to a Netduino analog output that's initialized to 3.3v, would I be able to momentarily set the analog output to zero and get the same result I got when I manually jumped the RN-42 RESET pin to Netduino's ground?
That's right.
You can use any OutputPort to drive low-then-high the reset pin. Quick and dirty.
However, there are no "analog outputs" on the Netduino. An "analog output" is able to give a continuous voltage within a given range, as a duality of the analog port/input.
By the way, in the case where I manually jumped RN-42 RESET to Netduino GND, I was kinda expecting 3.3V/1K or 3.3mA of current to flow. But when I jumped it with my multimeter, it read 1.2uA. Am I screwing up the measurement, misunderstanding Ohm's Law, or something else?
You are right again, but perhaps the multimeter has been set wrongly, or its internal fuse is blown.
Your attempt to measure the current, and applying the Ohm's law is correct!
Cheers
#3
Posted 16 December 2011 - 06:03 AM
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