Hi All,
Anyone had any experience with Roving Network's (now Microchip's) RN-XV?
The datasheet says that these wifi modules will only consume 4 micro amps of current in sleep mode.
But the best I have gotten with one of these things is about 40 micro amps.
I called Roving Networks directly and they confirm what I'm seeing - the extra hardware on the board consumes more than the stated 4 micro amps!
So I am over the marketing fib, but I'm seeing something very strange with my pcb design that might be answered by the geniusphere:
After attaching my pcb design to the RN-XV board, I see that the current consumption now reads about 500 micro amps in sleep mode. This is very strange. I touch one of the I/O pins with my finger (dont worry low power app!) on the RN-XV, and the current immediately ramps down to about 43 micro amps! Has anyone seen this situation before, where they touch a pin, and the current draw drops?
I'm making a guess here and I'm sorry I didn't attach any schematics I guess I'm curious what might cause that to happen. My first guess is trace capacitance, I do have a long trace going from my Microcontroller to the RN-XV.
My breadboard version of the circuit does read about 50 microamps, so my guess is that is the best current draw I can get.
I can post my PCB layout if requested.
Any clues?
J