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valentin2
Visitor II
November 15, 2016
Solved

CR95HF UART communication

  • November 15, 2016
  • 2 replies
  • 791 views
Posted on November 15, 2016 at 11:28

Hello,

I am writing this post because i have a problem with UART communication. I am using à microcontroller in order to communicate with the CR95HF chip but i can't have any response even when i'm sending an echo command. However, both pins SSI_0 and SSI_1 are connected to the ground and i'm pulling down the UART_RX/IRQ_IN more than 10us after i powered up the CR95HF chip as it's written in the datasheet.

I figured out a problem, my UART_TX/IRQ_OUT pin is always at 0V, but even if i link a pull-up resistor, i still have no answers.

Can anyone help me with my problem? i would really appreciate.

Best regards
    This topic has been closed for replies.
    Best answer by Peter Boringer
    Posted on November 25, 2016 at 16:39

    Hello Valentin,

    The described setup seems fine don't you mixed the TX and RX from the micro processor to the CR95HF  TX of CR95HF should be the RX of the uP whereas RX of CR95HF has to be connected to the TX of the uP.

    Else can you provide a schematics of the up to CR95HF part

    Regards

    2 replies

    V
    valentin2Author
    Visitor II
    November 17, 2016
    Posted on November 17, 2016 at 10:10

    No one ever had the same problem ?

    P
    Peter BoringerAnswer
    Visitor II
    November 25, 2016
    Posted on November 25, 2016 at 16:39

    Hello Valentin,

    The described setup seems fine don't you mixed the TX and RX from the micro processor to the CR95HF  TX of CR95HF should be the RX of the uP whereas RX of CR95HF has to be connected to the TX of the uP.

    Else can you provide a schematics of the up to CR95HF part

    Regards

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