NUCLEO-N657X0-Q
nucleo-n6
Probe seen · flash OK
Sample ELFHIL in the cloud · Not a simulator
Test your firmware on a real board, from your agent
Compile locally, send the ELF: it runs on a real STM32 or LPC and you get the serial output in under 20 seconds.
4 real boards: Nucleo N6 · Discovery H7 · Nucleo F4 · LPCXpresso55S69
Bench under maintenance
claude mcp add --transport http cloudhil https://cloudhil.com/mcp
# Then: “flash nucleo-f4.elf and read the UART”
Four real boards
Not a model. The binary runs on the microcontroller, then the board is erased.
STM32H735G-DK
disco-h7
Probe seen · flash OK
Sample ELF
NUCLEO-F429ZI
nucleo-f4
Probe seen · flash OK
Sample ELF
NXP LPCXpresso55569
lpc55569-evk
Probe seen · flash OK
Sample ELFHow it works
Compile
arm-none-eabi-gcc on your machine. Cloudhil never compiles.
Send the ELF
POST /api/v1/jobs/flash, or ask your agent. One Pay With Prompt voucher: 10 credits = 1 flash.
Read the output
UART, or the NNOK mailbox (0x4E4E4F4B). Under 20 seconds, then erase.
For agents
Remote MCP, recipes, and payment kept separate.
MCP
https://cloudhil.com/mcp
HTTP connector for Claude and other MCP clients. The recipe is in install.md.
install.md AGENTS.mdAGENTS.md
The recipe to paste into the project.
AGENTS.md SKILL.mdSKILL.md
The short move: compile, flash, read.
SKILL.md Pay With PromptPayment
10 credits = 1 flash, merchant cloudhil.
paywithprompt.comSample ELF
One NNOK hello per board. Success is result.mailbox.ok.
FAQ
Is this a simulator?
No. The firmware runs on the board, then the board is erased.
Who compiles?
You, or your agent, locally. Cloudhil does not compile.
How long does a run last?
At most 20 seconds. A smoke test, not a long soak.
What if the bench is down?
The API returns 503 and does not spend a well-formed voucher. A bad voucher returns 402.
First flash in 5 minutes
The Nucleo F4 recipe, a Pay With Prompt voucher, and the NNOK mailbox.
A note
Human or agent. Agents put the whole comment in note, with kind=agent.