1. What’s the MOQ of STONE product?

We accept MOQ 1 piece as the sample order.

2. How can I purchase? What’s the payment method?

We accept T/T, credit, PayPal, or western union as the payment method.

3. What is the warranty policy for STONE product?

We provide an unlimited warranty for our customers. No matter what kind of failure, damage, or issue happened during the warranty, STONE will provide you the replacement for free.
STWC series has a 1-year warranty.
STWI series has 3 years warranty.
STWA series has 3 years warranty.

4.What is STONE product?

Our TFT-LCD Module is an intelligent TFT LCD display module that includes:
-CPU (1GB Hz Cortex A8); 
-LCD driver module;
-FLASH memory (128 MB, can be extended to 1GB);
-UART (RS232/RS422/RS485/TTL/Lan/WIFI) port;
-STONE Designer (Free GUI design software).

5. How does the STONE display work?

What you need to do with the STONE product is:
1)Design your own interface with the STONE Designer(Free GUI Designer software)  files and generate a project file.
2)Download the project file into the STONE display by USB, then connect the display with your MCU or another control device by UART interface (RS232/RS485/TTL).
3)Program your MCU to communicate with the display by the customized command sets.

6.What is the meaning of the model number description?

Taking STWI070WT- 01 as an example:
STW: Company code
I: A=Advanced Type     I=Industrial Type     C=Civil Type
070: TFT Panel Dimension: 7 inch
W: W=Wide Voltage
T: T=With Resistive Touch Screen 
N=Without Touch Screen 
C=With Capacitive Touch Screen
0: 0=RS232      4=RS485      1=TTL
1: Hardware code

7. What is the communication protocol for STONE product?

The communication protocol is customized command set. 
For example:    

ST<   {   "cmd_code":"sys_hello",  "type":"system" }   >ET

Frame header    hand-shack instruction   system widget   Frame tail

ST<  {  "cmd_code":"get_text",  "type":"label",  "widget":"label2"}  >ET

Frame header    text instruction     label widget    label name    Frame tail

8. Can we use Arduino as the controller of STONE product?

Yes. Arduino have the TTL signal pin. You can directly use STONE display with TTL interface (please contact with our staff to confirm the interface type). Or you can use MAX3323 chip to converter the TTL signal to RS232 signal. 
You can check the link to get the specific steps:
https://www.arduino.cc/en/Tutorial/ArduinoSoftwareRS232

9. Can we use Raspberry Pi as the controller of STONE product?

Yes. Raspberry Pi provide build-in/mini UART. They are implemented using different hardware blocks, so they have slightly different characteristics. However, both are 3.3V devices, which means extra care must be taken when connecting up to an RS232 or other system that utilises different voltage levels.
You can check more details in the link below:
https://www.raspberrypi.org/documentation/configuration/uart.md

10. Can we play videos/audios on STONE product?

Yes, you can. STV series product has the build-in video/audio play function. You can storage the video file (.AVI format) or audio file (.mp3 format) in the flash memory, or USB disk, and add a video play module in the interface.

11. Can we design the customized graphic user interface (GUI) for STONE product?

Yes, you can use our STONE Designer (Free GUI design software) to design your own GUI with images, icons, audio files, and fonts libraries. And you will generate a project file and download it in the flash memory of the display.

12. Do you have some demo project for reference?

Yes. We have over 20 DEMOS including medical device, beauty machine, dash board, home control system, vending machine, EV charger, solar system and etc. Please contact with our staff for the detail and let them send you the demo you need.