Now I am testing the second RFM12B. I shifted the jumper wires previously connected to RFM12B # 1 to #2. Then I used Test 3 function to check that the external mpu clock indeed as expected changed to 2MHz, then 5 MHz, and back to 1 MHz.
For now I am only selecting either RFM12B by hand, shorting the selected RFM12B's nSEL to ground. Next step I would tried to use RPi to select either device.
.END
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