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NRF24L01 and arduino mega, getting garbage value

Hi all, help me please.

I am using two NRF24L01 (green color) 1 NRF24L01 is connected with Arduino mega 2560 another one is connected with arduino ADK I was trying to sent ascii command from mega to ADk wirelessly and Arduino ADK will sent back sensor value to arduino mega It was working fine, however one day nothing worked. I am sure that my code is correct because it worked before.

When I am not sending anything to my other NRf24L01, that NRF24L01 always read 0 or -256 or some weird letter

And when I am sending ASCII command, it shows that the command is sent but on my receiving part, it shows 0 or -256 value, not the value I am sending.

I have also noticed one thing, one of my NRF24L01 get heated up immediately I power it. I did connect the VDD to arduino mega's 3.3V pin. It just worked fine few days back, but not now.

Please, tell me what to do. :(

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