Specifications
Display capacity: 16 × 2 characters
Chip working voltage: 4.5~5.5V;
Working current: 2.0mA (5.0V)
The best working voltage of the module: 5.0V
Character size: 2.95×4.35(WxH)mm

Pin definition：
1602 standard 16-pin interface, including:
Pin 1: VSS is the ground power.
Pin 2: VDD then 5V positive power supply.
Pin 3: V0 LCD contrast adjustment end, then the positive power supply when the contrast is the weakest, the highest contrast when grounded power, the contrast is too high will have a ghosting, when used by a 10K potentiometer to adjust the contrast.
Pin 4: RS for the register selection, high-level data register selection, low-level instruction register selection.
Pin 5: R / W for the read and write signal lines, high-level read operation, low-level write operation.
Pin 6: E end is enable end, when E end jumps from high level to low level, the liquid crystal module carries out the order.
Pin 7~14: D0 ~ D7 for the 8-bit bidirectional data lines.
Pin 15: the positive power supply backlight
Pin 16: backlight power negative

Package includes:
2 x 1602 16x2 Character LCD Screen Module(yellow green screen)
1 x 8pin Female to Male Dupont Cable