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Intel Edison: terminal keeps dropping the very first character

Dmitri_M_
Beginner
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The same behavior with the recommended putty and Tera Term. When you start typing after a break of approx 10 seconds, the first character is not there.

Is it a bug or a feature?
 

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Matthias_H_Intel
Employee
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it has been a known issue which I think is fixed with latest firmware - at least I haven't seen this behaviour on my systems for a while (but mostly connected via ssh anyways)

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PeterKerney
Employee
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The Intel® Edison board has a known error on all UARTs. When the Intel® Edison board goes into low power sleep, the UART internal FIFO and interface is powered down. Therefore, a two-wire UART (Rx/Tx) will lose the first received character whenever the Intel® Edison board is in sleep mode. In order to avoid this condition, when sleep mode is enabled, a four-wire UART (Rx, Tx, CTS, and RTS) is required.

Intel® Edison Arduino Board Hardware Guide (page 17)

https://communities.intel.com/docs/DOC-23161

 

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Matthias_H_Intel
Employee
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peter-kerney (Intel) wrote:

The Intel® Edison board has a known error on all UARTs. When the Intel® Edison board goes into low power sleep, the UART internal FIFO and interface is powered down. Therefore, a two-wire UART (Rx/Tx) will lose the first received character whenever the Intel® Edison board is in sleep mode. In order to avoid this condition, when sleep mode is enabled, a four-wire UART (Rx, Tx, CTS, and RTS) is required.

Intel® Edison Arduino Board Hardware Guide (page 17)

https://communities.intel.com/docs/DOC-23161

 

How comes I don't see this issue any longer on ww42 image?

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samontab
Valued Contributor II
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matthias-hahn (Intel) wrote:

Quote:
How comes I don't see this issue any longer on ww42 image?

Can confirm. The version that came installed in the Edison had that problem. After I updated the image, it is now working fine as of Edison v120. (configure_edison --version).

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