DHT 11 sensors and i2c LCD to Wemos Wifi not Working
Constant D14 is for Wemos D1 and other esp8266 dev boards mapped in arduino core to esp8266 io pin 4. Pin 4 is used as I2C SDA pin. The LCD uses I2C so pin 4 (D14) can't be used for the sensor.

from pins_arduino.h for Wemos D1 R1:

#define PIN_WIRE_SDA (4)
#define PIN_WIRE_SCL (5)

static const uint8_t D14  = 4;
static const uint8_t D15  = 5;


The origin of this confusing esp8266 io pin to Dx constants mapping is the big Wemos D1. There are esp8266 pins mapped to standard Uno pinout.