I would need some help with a problem I am encountering and it is this:
I have a N + with firmware 4.2.0.1 and a N2 + in which I recently installed (thanks to the indications of the community) to version 4.2.2.2 because I am working with VS2010.
The application with N + works correctly but with N2 + no. Specifically I have an RS232 shield that sends information.
I would like to know if any firmware or hardware differences between N + and N2 + could be the cause of this happening.
I have tried using COM1 and COM2 but the problem continues.
Apparently the transmission takes place but the data is not sent.
The RS232 shield used is the LinkSprite shield.
In case the problem is firmware, is it possible to install version 4.2.0.1 in N2 +?
Thank you in advance for your always attentive collaboration.
I will check with a scope and also try with the pull-up.
Accidentaly check that if RX wire is not connected to the shield the transmission works ok, if is connected, the shield´s MAX232 goes very very hot, any idea?