Options for Two Serial Ports on MicroView?

Archive Microview Support
1

I’m looking to use my MicroView as a data translator/sniffer between two serial devices, running at a low serial baud of 2400.

I had assumed it would be trivial to use the regular Hardware Serial on pins 0 and 1 and the common SoftwareSerial on two other pins, but [according to this thread, SoftwareSerial and the hardware Serial actually conflict due to interrupts. So that’s out.

[AltSoftSerial uses pins 8 and 9, which aren’t available on the MicroView.

[sss.ino uses pins 3 and 4, and pin 4 isn’t available on the MicroView.

Any other options or suggestions?](Yet another Software Serial - Programming Questions - Arduino Forum)](AltSoftSerial Library, for an extra serial port)](Dropped Characters With Hardware/SoftwareSerial Bridge? - Networking, Protocols, and Devices - Arduino Forum)

2

I don’t know what your hardware/cost/size requirements are, but you could consider adding an I2C to UART converter chip, such as the SC16IS740, SC16IS750 or MAX3107.

3

That’s an intriguing idea! I’ll look into it more. I was hoping to keep it all through-hole, and haven’t found those in a through-hole version of those parts yet. I do have the space on the board.

4

Schema:
I was hoping to keep it all through-hole, and haven’t found those in a through-hole version of those parts yet. I do have the space on the board.

If you've got a fair bit of space, the SC16IS750 is commonly available on a breakout board with a crystal and support components, which could be mounted through-hole on your main board.

http://www.ebay.com/sch/i.html?_nkw=SC1 … mfe=search

Note that since the SC16IS750 is a maximum 3.3V part, you will probably also need level shifters on the I2C signals.