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1. #Sainsmart 20x4 lcd datasheet how to
2. #Sainsmart 20x4 lcd datasheet driver
3. #Sainsmart 20x4 lcd datasheet software
4. #Sainsmart 20x4 lcd datasheet code

This means you may have to reverse the back light ON/OFF bits. Since SainSmart does not seem to believe in datasheets there is no way to tell if the transistor that drives the back light is an NPN or PNP except by visual inspection or testing. One thing about these White-on-Blue displays is that the back light must be on and the contrast must be correctly adjusted before you can see any characters. However, if the chip is a knockoff or counterfeit of a real NXP PCF8574AT, then the marking may not matter.

Look at the chip on the expander board is it a PCF8574T or PCF8574AT? Only the AT Version should support an address of 0x7E. This address is only possible with the PCF8574A. The 8-bit address will therefore be 0x7E. SainSmart publishes the I2C Address as 0x3F.

The I2C adapter uses the PCF8574 I/O expander which is supported by LCD.H.The LCD module seems to be a generic parallel type. I see no reason that the SainSmart display will not work with the current GCB/LCD.H driver.

'I2C settings define I2C_MODE Master define I2C_DATA GPIO.2 define I2C_CLOCK GPIO.1 You also need pull-ups on the clock and data pins (10k). The main thing is you have to look at the datasheet as displays will have different codes to go into command and data modes and they should all have different id codes (so you can have more than one device on the same pins).

#Sainsmart 20x4 lcd datasheet code

SainSmart discontinued restock_form Retired add-to-cart I wrote some code for a Midas COG display (from rapid electronics).

#Sainsmart 20x4 lcd datasheet how to

Look on the arduino site for instructions for how to install custom libraries if you need help on that.įor the UNO, connect the pins as follows: The link is below the sample code above called LCD2004. Lastly, make sure that you download and install the custom library and header files LiquidCrystal_I2C. The BYTE keyword is no longer valid, but to make the code sample above work, simply delete the word BYTE and the comma that precedes it where ever you see it.

#Sainsmart 20x4 lcd datasheet software

Like Eric, the software came up with the address 0x3F so that has to be changed in the code sample. Ultimately, I followed Eric's example from above and used the I2C scanner and then tested out the various pin locations until I the LCD was recognized. I found numerous examples that showed different pins used. I am new to arduino and LCDs so it is expected to be harder.

#Sainsmart 20x4 lcd datasheet driver

For Arduino beginners, not for the cumbersome and complex LCD driver circuit connection and a headache, the real significance of this LCD module will simplify the circuit, this module directly into the Sensor Shield V5.0 sensor expansion board IIC device interface can, GM 4P sensor connection cable, programmed through the controller, you can easily identify the slogan, sensor data records The latest IIC LCD2004-character LCD display module, a new high-quality 4 line 20 character LCD module not only set the contrast control knob selector switch also has a backlight and IIC communication interface.