DFR0760 Speech Synthesis V2 not working in UART and I2C (arduino library)?

After purchasing the DFRobot Gravity voice recognition module and having it work using the Arduino UNO R3 (5vdc) library coded for UART and I2C, I was able to also interface it to an Agon Light 2 single board computer (3.3vdc) which it worked similarly to the Arduino library code for UART. I haven't written I2C code for it yet. 

tdg8934/Agon-Light-2-Serial-Voice-Recognition: DF Robot - Gravity Offline Voice Recognition Sensor (3.3vdc useage) on Agon Light 2 (github.com)

I then purchased the DFR0760 Speech Synthesis V2 and connected it up similarly per the DFRobot wiki instructions for both UART and I2C first on the Arduino UNO R3. I used the library and example code for both UART and I2C and saw/heard nothing from the DFR0760 Speech Synthesis V2 module. I also tried to write some code for the Agon Light2 single board computer for the UART and still had no response from the module. 

Did I get a defective module? Is there a replacement policy or anything else I should try? 

I purchased it from electro maker online as I have in the past with no issues due to shipping cost being a little lower and within the USA. 

Thank you. Tim Gilmore