Show Claude Code and Codex usage limits on an ESP32 screen
His ESP32-S3 desk display shows his Claude Code and Codex 5-hour and weekly usage when idle. The PC pushes the numbers over Wi-Fi so credentials stay on the PC, and it backs off when rate-limited.
Source
@hardyhuang818 on X · 2026-10-12
Written in our own words. Credit to the original author. Link checked 2026-10-21.
What they did
His ESP32-S3 desk display shows his Claude Code and Codex 5-hour and weekly usage when idle. The PC pushes the numbers over Wi-Fi so credentials stay on the PC, and it backs off when rate-limited.
Result (as claimed)
Built in 4 days.
Tools they used
Cost: Claude Code: from $17/mo; OpenAI Codex: free plan, paid from $8/mo.
Set it up
Pick a contained repo or task
Start on a branch or side project where mistakes are cheap.
Install and configure
Set up Claude Code, OpenAI Codex, ESP32. Read what it can run on your machine and limit permissions where possible.
Run it on a real task
Give it a well-scoped issue and let it work. Review the diff like any pull request.
Add guardrails
Keep tests and CI in the loop, and never let an agent push to main or touch production secrets unattended.
Copy the full setup prompt
Paste into your agent and it will walk you through the setup, asking before anything that sends, posts or spends.
You are helping me set up this AI use case end to end in Claude Code. Goal: Show Claude Code and Codex usage limits on an ESP32 screen What the original author did: His ESP32-S3 desk display shows his Claude Code and Codex 5-hour and weekly usage when idle. The PC pushes the numbers over Wi-Fi so credentials stay on the PC, and it backs off when rate-limited. Reported result (as claimed by the author): Built in 4 days. Source: https://x.com/hardyhuang818/status/2109483328936300791 Tools they used: Claude Code, OpenAI Codex, ESP32 Category: Dev & ops Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Codex. Goal: Show Claude Code and Codex usage limits on an ESP32 screen What the original author did: His ESP32-S3 desk display shows his Claude Code and Codex 5-hour and weekly usage when idle. The PC pushes the numbers over Wi-Fi so credentials stay on the PC, and it backs off when rate-limited. Reported result (as claimed by the author): Built in 4 days. Source: https://x.com/hardyhuang818/status/2109483328936300791 Tools they used: Claude Code, OpenAI Codex, ESP32 Category: Dev & ops Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
You are helping me set up this AI use case end to end in Grok Bot. Goal: Show Claude Code and Codex usage limits on an ESP32 screen What the original author did: His ESP32-S3 desk display shows his Claude Code and Codex 5-hour and weekly usage when idle. The PC pushes the numbers over Wi-Fi so credentials stay on the PC, and it backs off when rate-limited. Reported result (as claimed by the author): Built in 4 days. Source: https://x.com/hardyhuang818/status/2109483328936300791 Tools they used: Claude Code, OpenAI Codex, ESP32 Category: Dev & ops Please: 1. Ask me 3 short questions about my situation (accounts I have, budget, what I want the output to look like). 2. Propose a step-by-step plan using these tools or cheaper alternatives, with the time and cost of each step. Use official pricing pages; say "check pricing" if unsure. 3. Then do the setup with me one step at a time, waiting for my OK before anything that sends messages, posts publicly, spends money or deletes data. 4. Finish with a checklist to run it again next time.
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Guides for this use case
How to vibe code an app with Claude Code · How to use Claude Code and Codex together · How to build a smart home and voice assistant with AI agents · How to build hardware projects with AI agents
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