WeMos D1 mini pcb with pcf8574 and encoder PCBWay. Here is the PCB schema. It’s become quite complex because I’m going to add the switches to change the address of pcf8574 some jumper to activate buttons or use the pins as output. WeMos D1 mini pcf8574 encoder shield PCB. Start milling to get the prototype. J-M-L: sure - but checking the status of 2 pins takes only a few micro-seconds --> that won't kill your performance even if it's just a WeMos (compared to wifi latency and other operations)
The genuine WeMos D1 Mini (not Pro) uses the CH340 chip and Windows driver is available at https://wiki.wemos.cc/downloads It’s an executable so just run it but not sure it works with the fakes. sagirokach June 30, 2017, 3:10pm
0. I have a Wemos D1 Mini ESP8266 which works fine stand-alone. But when I connect it to my copper strip board circuit, I can no longer flash it. The Arduino IDE searches for the COM communication and times out. The circuit is simple. 10k pull up resistors on D0, D1, D5, D6, D7, D8. The common end of the pull-ups are connected to the 5V pin.

WeMos D1 mini are fairly inexpensive. They come with the CH340 USB to Serial controller chip. Why go through the hassle of using the ESP8266MOD? The only reason I would not use an integrated WeMos D1 mini is to limit my power consumption and extend the battery life apart from saving a few dollars.

The D1 module is a mini WIFI board based on ESP-8266EX. This WLAN board contains 11 digital input / output pins, all pins have interrupt / pwm / I2C / 1-wire and a micro-USB connection. The D1 mini development board is compatible with Arduino WeMos and can be programmed in the for Arduino IDE. The easiest way to find the active hardware package location is as follows: Move up folder levels until you reach the one that contains boards.txt. The other thing you need to know about editing boards.txt is the changes won't appear until you close all Arduino IDE windows and then start the Arduino IDE again.
WeMos D1 mini (esp8266), the three type of sleep mode to manage energy savings WeMos D1 mini (esp8266), integrated LittleFS Filesystem esp12 esp07 (esp8266): flash, pinout, specs and IDE configuration
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It's actually super convenient and I'm really happy they added it. Deep sleep on the ESP8266 is kinda clunky and limited (this was remedied with the ESP32, which has some very powerful sleep modes), but this helps at least. All dev board breakouts for the ESP8266 should have a jumper like this but most don't, I have no idea why.

I’m just trying to run the example cylon code, and the only modifications made were to set the LED pin to D6 on the D1, and to include the esp8266 library. It is running but I’m getting some strange random flashing, as seen in this video. Any ideas? Hardware-wise I’m using the evil genious board with level shifter for the wemos D1 mini.

Hi! I recently purchased some Wemos boards to test them out (D1, D1R2 and D1 mini) Soon after trying my first DHT22 project, not being able to get a reading from the sensor, I tried moving the data pin to another IO in the Wemos. Then it started to work So I realized that from the D0D8 pins that are allegedly exposed as "General I/O pins", it looks like 3 of them (at least D3/4/8) are zFhpZ.
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    • what is wemos d1 mini