g15 - fail to upload sketch

[bob]

hi
im trying to set id for my g15 servo but every time i try it fail

im using arduino 1.0.5 + arduino mega 2560 r2 + g15 driver
wiring connection is like suggested by cytron.
i tried to upload other example sketch (basic), it also fail
then i tried w/out the tx/rx jumper cable, it success.

did i do wrong some where?

[robosang]

If you are using Arduino, you should use the shield for G15.

Studying the G15 driver schematic, you will know that it is using UART to transmit and receive data to/from G15

Arduino will use UART to load program too, so they interfere it.

[bob]

thank you for reply

do you mean that if i want to use arduino + g15 servo, the only way to do it
i have to use shield and not the driver?

what if i want to use other mcu, like pic, does it interfere too?

[ober]

robosang is correct, the g15 driver is using the UART line and loading program into Arduino needs UART too. This happen in many other UART shield such as Xbee shield. The trick is to disconnect one of the UART line during program loading. Just try and see, I cannot remember which line.

If you use other MCU, it depends on how you load program. If loading program still require UART, the interference might still be there.

You still can use the g15 driver.

[yonghui]

if you are using Cytron G15 Shield Library, u will need to open the G15.h in library, and change the following code:
#define TxMode LOW
#define RxMode HIGH

to

#define TxMode HIGH
#define RxMode LOW


if you are using library on G15 driver page from cytron then its ok.


when loading program to the Arduino, disconnect the G15 driver, connect it only after programming is done.