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October 28, 2016
I’m a programmer since childhood, but I was always interested in the hardware as well. Especially microcontrollers.
about 2 years ago
If you solder wires to the onboard flash chip’s legs then you get the GPIO6-11 :)
But there’s the HS2/SDIO2 interface which can be used for 4-bit SD cards, and those pins are broken out.
Do you see any output on the serial when you press the reset button?
By default the bootloader should print out some stuff. And during this, the blue LED next to pin “5” is at about half brightness.
(By the way, I’ve ordered 2 boards and both had blink flashed on them by default. I think it’s a “SparkFun default”)
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