I've tested this on two different Wemos D1 mini boards. I have also tried the EspSoftwareSerial library and was able to force the compiler to select it by making a file named EspSoftwareSerial.h in the library src folder with #include "SoftwareSerial.h". The "onewire" example uses D6, D5 and uses only the Wemos itself.
DHT11 is a temperature and humidity sensor. It will collect the data and send to WeMos D1 Mini WIFI Module. This module will display the data in a OLED display. The wifi module will also send the data to Blynk. We can also monitor the temperature and humidity changes in our smartphones using Blynk app. Parts List. WeMos D1 Mini x 1; DHT11
Again, the docs will assist you here but basically you just go to setting > Devices & Integration > add integration > ESPhome > enter the fixed IP address for the D1 mini that you programmed it with. Then you can create HA automations to have the P.E. Beam trigger whatever you want in HA. next page →.
The WeMos D1 mini PRO is a miniature wireless 802.11 (Wifi) microcontroller development board. It turns the very popular ESP8266 wireless microcontroller module into a fully fledged development board. Programming the D1 mini pro is as simple as programming any other Arduino based microcontroller as the module includes a built in microUSB interface allowing the module to be programmed directly
Impact on Power Consumption - 2 Deep Sleep. The Deep Sleep requires a simple hardware modification - a jumper is needed between the Reset Pin and and Pin D0 of the Wemos D1 mini. Pin D0 on the Wemos maps to GPIO_16 on the ESP8266 - this has a WAKE feature. During the Deep Sleep period, D0/GPIO_16 are held high.
The best Battery for the ESP8266. Overview of ESP8266 Voltage Levels. ESP8266 NodeMCU Voltage Levels. ESP8266 WeMos D1 Mini Voltage Levels. AA Alkaline Batteries for ESP8266. LiFePO4 Battery for ESP8266. LiPo and Li-ion Battery for ESP8266. AAA NiMH Batteries for ESP8266. 9V Alkaline Block Battery for ESP8266. PIAgRv8.
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    • wemos d1 mini power requirements