1. IOT Product Diagrams and Specifications

2. Bluetooth Module (with antenna)
Specifications
SHINE MP3 library
Bare Metal
USB Power Input
A2DP input signal
Port for UART Debugging Circuit
“Bookshelf Quality”
$150 MSRP -> $30 for parts or less
Design Questions
How many bits of audio do you need?
What’s the maximum number of bits that would be reasonable? What’s the bit rate/throughput?
What’s the noise floor
Do you have to use a DAC?
Bluetooth Speaker Adapter Circuit
USB Power
Power Supply
Bluetooth Audio
Signal
Bluetooth Module (with antenna) M0
Class D
Amp
Line Out
A2DP
I2S/SPI
DAC
UART
Debugging Circuit

3. Bluetooth Module (with antenna)
Bluetooth Speaker Hub Circuit
Specifications
SHINE MP3 library
Linux
USB Power Input
A2DP input signal
Design Questions
How many bits of audio do you need?
What’s the maximum number of bits that would be reasonable? What’s the bit rate/throughput?
What’s the noise floor
Do you have to use a DAC?
USB Power
Power Supply
Bluetooth Audio
Signal
Bluetooth Module (with antenna)
Linux SOC
Class D
Amp
Line Out
I2S/SPI
DAC
A2DP
ADC
GPIO
Control
Buttons
SPI
SPI
Line In
SoundCloud API
Ethernet MAC
LCD Display