Expected completion time of this lab: 20 min.

Enable the D0 GPIO

This step enables the GPIO input pin. It is a required step for reading its value or activating notifications.

The D0 GPIO corresponds to the DP2 pin on the DC9003 SmartMesh Eval/Dev Mote.

To fill in the table below, take a look at the SmartMesh IP Tools Guide, chapter "On-Chip Application Protocol"

Fill in the following table to create the command to send to the mote to enable the digital_in/D0 GPIO:

field name		length	value	explanation
control byte		1 byte	`05`	N.A.
id byte		1 byte	`00`	N.A.
command		1 byte	Answer 17.1: look for the "Command field" table in the tools guide	PUT
channel	type	1 byte	`ff`	type: address
	length	1 byte	`02`	length: 2 bytes
	value	2 bytes	Answer 17.2: look for the "Addressable Elements and Pinout" list in the tools guide	value: digital_in/D0
variable	ID	1 byte	Answer 17.3: look for the "/digital_in" section in the tools guide, variable "enabled"	type: enable
	length	1 byte	`01`	length: 1 byte
	value	1 byte	Answer 17.4: look for the "/digital_in" section in the tools guide, variable "enabled"	enabled

Read the value of the D0 GPIO

To fill in the table below, take a look at the SmartMesh IP Tools Guide, Chapter "On-Chip Application Protocol"

Fill in the following table to create the command to send to the mote to read the current value on digital_in/D0 GPIO:

field name		length	value	explanation
control byte		1 byte	`05`	N.A.
id byte		1 byte	`00`	N.A.
command		1 byte	Answer 17.5: look for the "Command field" table in the tools guide	GET
channel	type	1 byte	`ff`	type: address
	length	1 byte	`02`	length: 2 bytes
	value	2 bytes	Answer 17.6: look for the "Addressable Elements and Pinout" list in the tools guide	value: digital_in/D0

The mote will answer with the state of the pin itself.
Fill in the following table with the bytes you receive. Start by filling in the "values received" column by directly copy-pasting the bytes. Then, use the tools guide to fill in the "explanation" column.

Answer 17.7:

What is the state (value) of your pin?
Answer 17.8:
Connect a jumper between the DP2 and VSUPPLY pins. Make sure you can read the value of digital_in/D0 to be high.
Connect a jumper between the DP2 and GND pins. Make sure you can read the value of digital_in/D0 to be low.

NEVER CONNECT VSUPPLY AND GND TOGETHER!!