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New Contributor I
1,340 Views

Serial to USB not working

all i get is a blank console and inputing commands does nothing

im using this kind of cable:

http://www.amazon.com/gp/product/B010KII6VG?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00 http://www.amazon.com/gp/product/B010KII6VG?psc=1&redirect=true&ref_=oh_aui_detailpage_o01_s00

and i correctly placed each part with it's corresponding pin, for example, the tx/rx, etc. on the cable with the pins on the gen 2 board, however, when i boot and i console in my console is blank and i cant put any commands in, nor can i compile/upload

*update: i changed the COM ports to no success

under 'device manager' the COM port is named:

'USB to Serial - COM 8'

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6 Replies
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Employee
4 Views

Hello AdanChristo,

Your description sounds good, according to it the console should work, did you make sure that the black wire on the FTDI cable is connected to the GND pin? Also, did you install the FTDI drivers?

Can you show us the configuration you used on PuTTY?

Is the board functional? I mean, can you upload Arduino sketches? Or, is there any LED activity?

Peter.

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Valued Contributor II
4 Views

Hi,

only one point is wrong in this cable: TTL level is for 5V, but need to have 3.3V.

So, need to use another cable with 3.3V TTL levels.

BR,

xbolshe

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New Contributor I
4 Views

how can i modify the cable to take in 3.3 v? buying another cable is not an option

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Valued Contributor II
4 Views

Only change 5V TTL logic chip inside the cable to another one for 3.3V.

Do not think that it is an option...

BTW, there is another model for 3.3V:

http://www.amazon.com/EZSync-connector-TTL-232R-3V3-compatible-EZsync007/dp/B010KHHD6G/ref=sr_1_1?sr... http://www.amazon.com/EZSync-connector-TTL-232R-3V3-compatible-EZsync007/dp/B010KHHD6G/ref=sr_1_1?sr...

BR,

xbolshe

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Valued Contributor II
4 Views

I guess yes. But I do not recommend it because of 5V and 3.3V mix. A reason is described there:

https://www.sparkfun.com/products/9717 https://www.sparkfun.com/products/9717

Originally, the cable was designed to have 3.3V VCC, however something was lost in translation between SparkFun and our supplier and we got stuck with a whole bunch of FTDI cables that have a slight mix up in wiring. These have 5V VCC, and 3.3V I/O. The 5V Vcc output shouldn't be a problem unless this cable is being used to power a sensitive circuit such as a sensor.

BR,

xbolshe

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