John VK2ETA some time ago provided information about his experiments with the SSM2167 module available on eBay.com and Aliexpress.com for a few dollars. The following shows the wire up diagram:
Picture of 4 pin molex connector added to the V3 Raduino for pickup of T/R (D7), +5V, I2C SDA, I2C SLD.
Note that the Arduino was replaced and put on headers as John uses a remote LCD display.