(using 2.0.0 package manager version)
The Wemos D1 mini's pins do not map to arduino pin numbers accurately. Here is the mapping as I have found it so far (using pinmode(), digitalWrite()'s, and a mega for analogRead()'s): normal status: d0=low, d1=high, d2=low, d3=high, d4=high, d5=high, d6=high, d7=high, d8=low After running the test with '10' pin d1 appears to have become normally low. Not a clue why, but I have eliminated those 'd1 low' results below. arduino pin -> result/connection
0 -> d3
1 -> nc 2 -> d4 = led 3 -> nc 4 -> d2 5 -> d1 6 -> watchdog(4) reset 7 -> watchdog(4) reset 8 -> watchdog(4) reset 9 -> watchdog(4) reset 10 -> nc 11 -> watchdog(4) reset 12 -> d7 low, d6 sporadic 13 -> d0 high, d7 sporadic 14 -> d0 high, d6 low, d7 low, d5 sporadic 15 -> d0 high, d8 sporadic 16 -> d0 17 -> nc 18 -> nc 19 -> nc 20 -> stack trace and pin-based(2) reset 21 -> stack trace and watchdog(4) reset 22 -> stack trace and watchdog(4) reset 23 -> stack trace and watchdog(4) reset 24 -> nc 25 -> nc 26 -> nc 27 -> nc 28 -> nc 29 -> nc Wemos D1 Pinout
In this Instructable I will guide you through the steps needed to install, configure and program the WeMos-D1R2 board using the Arduino IDE.
WeMos-D1R2 is an ESP8266-12 based WiFi enabled microprocessor unit on a Arduino-UNO footprint. That means the board looks and works (in most cases) like an UNO. Apparently several shields, sensors and output devices that are manufactured for the Arduino platform will work on the WeMos-D1R2 with the added advantage of builtin WiFi.
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Arduino Blink Wemos D1 3
There are two WeMos boards in the market.If you are not careful you will end up with a D1 Board which is an older version. You have to make sure you have the current version of the board WeMos-D1R2. I bought my WeMos-D1R2 from Banggood, I believe it is a Hong Kong based online retailer. The quality of the product is good and has a short delivery time, about two weeks to the US. They carry the genuine WeMos-D1R2. There are several older model WeMos-D1 being sold as WeMos-D1R2 to unsuspecting customers by several other vendors.
Arduino Flash Wemos D1 Mini
You will find several similarities between this Instructable and my previous one - Programming the ESP8266-12E using Arduino software/IDEbecause of the fact that the ESP8266-12 is the foundation of the WeMos-D1R2 board. In some cases I have copied and pasted the complete steps.
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