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Top 5 Positive Customer Reviews for 3.3v
Important to note that pin OE should be tied to VCCa when the board should be active if you want VCCb-powered pins to be active or tied to ground if not, but should not be left floating.
Super fast delivery. I have just connected power source to the micro USB, OLED indication showed the list of WiFi stations around my area, and then switched to the LoRa initial failed screen. Actually the board has no LoRa chip, so probably at factory loaded the same firmware, in order to test assembled board. So far everything works as expected. Thank you!