Part 3 is the program. Ask the AI for a ladder in one line, deploy it to the board, and move a relay.

What you need

Item	Detail
Project	`Test` from Part 2, with main board GO-RP2040-CB08 and the port already set
Board	USB and DC 24 V connected, buttons on `IN01` and `IN02`
Claude Code	Installed and logged in as in Part 1

1. Open the Claude console

Mode	When
1. AI mode	The AI runs everything from interview to verification step by step and asks for approval at each step
2. Assistant mode	Ask and it edits right away. This is the one used here

When the Mode field at the top of the AI page reads Assistant Mode, you are ready.

2. Ask for the ladder in one line

On main board GO-RP2040-CB08, make a latching circuit: pressing IN01 turns OUT1 on, pressing IN02 turns it off.
Three seconds after OUT1 comes on, turn OUT2 on as well. Use the I/O mapping for addresses (inputs P0-P3, outputs P4-P7).

Entering the request in the Claude console and watching symbols and ladder get generated

When it finishes, open Symbols and Ladder in the left menu and check that the result matches what is below.

Symbols

The symbols page with BTN_ON P0, BTN_OFF P1, OUT1 P4, OUT2 P5, M_Run M0 and T_OUT2_DLY T0 added

Name	Address	Role
`BTN_ON`	`P0`	IN01 start button
`BTN_OFF`	`P1`	IN02 stop button
`OUT1`	`P4`	OUT1 relay
`OUT2`	`P5`	OUT2 relay
`M_Run`	`M0`	Run state
`T_OUT2_DLY`	`T0`	3-second timer

Ladder

The generated four-rung ladder: latch, OUT1 output, TON 300 delay, OUT2 output

Rung	Content
1	`BTN_ON` or `M_Run` → `BTN_OFF` NC contact → `M_Run`. Stop-priority latch
2	`M_Run` → `OUT1`
3	`M_Run` → `TON(T_OUT2_DLY, 300)`. 10 ms × 300 = 3 s
4	`T_OUT2_DLY` → `OUT2`

3. Deploy

Status bar	Meaning
Building…	Converts the ladder to Arduino code and compiles it
Uploading… (COM17)	Uploads over the port picked in Part 2. The port number differs from PC to PC
Upload succeeded. The board is booting the new firmware.	The board runs the program

The first deploy

The first time you click Deploy, two windows come up one after the other before the build. They do not appear again.

Window	Button	What it installs
Install arduino-cli	Install	arduino-cli, the compile and upload tool
Install Core	OK	The `rp2040:rp2040` board core. Takes from tens of seconds to a few minutes

4. Check it in the monitor

In the monitor, pressing BTN_ON turns M_Run and OUT1 on, and OUT2 comes on 3 seconds later

Action	Result
Press `IN01`	`M_Run` and `OUT1` ON. The OUT1 relay closes
3 seconds pass	The timer value reaches 300 and `OUT2` goes ON. The OUT2 relay closes
Press `IN02`	Everything OFF

Recap

Part	What you did
Part 1	Installed the editor and Claude Code
Part 2	Wired the buttons, set the main board and port
Part 3	Ladder from AI, deploy, monitor

Senbrino Quick Start Part 3 - Write Ladder with AI, Deploy, and Move a Relay

What you need

1. Open the Claude console