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cellular-at-modem-integration

cellular-at-modem-integration is a skill for Claude Code, Codex from easyzoom/aix-skills. It costs 56 tokens per session (1,795 once invoked), scanned A, original, MIT.

A guide for connecting cellular modems to a microcontroller over UART, a serial communication link, using text-based AT commands. It covers network registration, mobile-data setup, internet sockets, modem startup, and unsolicited status messages.

In plain words
What is it for?
Use it with Quectel, SIMCom, or u-blox modems to check registration, configure an APN and data connection, open TCP or UDP connections, parse notifications, and troubleshoot power-up timing.
Why use it?
It helps diagnose problems where modem replies and background notifications arrive on the same serial connection, or where commands differ between modem families and network types.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

not rated 31repo 1mo ago A scan 56 tokens original MIT

Good fit Use it with Quectel, SIMCom, or u-blox modems to check registration, configure an APN and data connection, open TCP or UDP connections, parse notifications, and troubleshoot power-up timing.

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Install with agentmods
npx agentmods add skills/easyzoom/aix-skills/cellular-at-modem-integration
View source ↗ easyzoom/aix-skills
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add easyzoom/aix-skills --skill cellular-at-modem-integration
Clone the repo
git clone --depth 1 https://github.com/easyzoom/aix-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for cellular-at-modem-integration

README.md
[![agentmods](https://agentmods.dev/badge/skills/easyzoom/aix-skills/cellular-at-modem-integration/github.svg)](https://agentmods.dev/skills/easyzoom/aix-skills/cellular-at-modem-integration)
Your own site
<a href="https://agentmods.dev/skills/easyzoom/aix-skills/cellular-at-modem-integration"><img src="https://agentmods.dev/badge/skills/easyzoom/aix-skills/cellular-at-modem-integration/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for cellular-at-modem-integration

Your own site · 80×15
<a href="https://agentmods.dev/skills/easyzoom/aix-skills/cellular-at-modem-integration"><img src="https://agentmods.dev/badge/skills/easyzoom/aix-skills/cellular-at-modem-integration.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 56 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,795 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00056 $0.01795
Opus 5 $0.00028 $0.00898
Sonnet 5 $0.00011 $0.00359
Haiku 4.5 $0.00006 $0.00179

Measured 10d ago against content hash a97892beb5b7, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

cellular-at-modem-integration scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/cellular-at-modem-integration/SKILL.md · 90 lines

How it starts

The opening of the file, as written. The whole thing — 90 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Cellular AT Modem Integration

Overview

Use this skill to drive a 2G/4G/NB-IoT/LTE-M cellular modem from an MCU over UART with the AT command set. The hard parts are parsing unsolicited result codes (URCs) that interleave with command responses on one serial line, choosing the right registration command per radio access technology, using the correct socket command set for the specific module family, and getting PWRKEY boot timing right before any AT works.

When To Use

Use this skill when:

  • The user integrates Quectel (EC25, BG96, BC66), SIMCom (SIM7600, SIM800C, A7670), or u-blox (SARA-R4, SARA-R5) over UART.
  • The issue involves registration (AT+CPIN?, AT+CSQ, AT+CREG?, AT+CGREG?, AT+CEREG?), APN/PDP (AT+CGDCONT, AT+CGATT, AT+CGACT), or sockets (AT+QIOPEN, AT+QISEND, AT+CIPSTART/AT+CIPOPEN, AT+USOCO).
  • URCs such as RING, +CMTI, or +QIURC corrupt command parsing, or power saving (AT+CPSMS, AT+CEDRXS) breaks reachability.

Do not use this skill when the UART link itself is unproven; confirm the modem echoes AT with OK at the configured baud first.

First Questions

Ask for:

  • Exact module and firmware revision (ATI, AT+CGMR), and radio technology: 2G, LTE Cat-1, Cat-4, Cat-M1, or NB-IoT.
  • UART wiring: baud, flow control (RTS/CTS), and whether PWRKEY/reset lines are MCU-controlled.
  • SIM type and the operator APN (some IoT SIMs need username/password or a specific <PDP_type>).
  • Transport goal: raw TCP/UDP, or bridging to MQTT/TLS on top of the socket AT layer.
  • Current failing command and its literal response or error code.

Integration Checklist

  1. Bring up the modem. Assert PWRKEY for the module's specified pulse width, wait for boot (often signalled by an RDY URC), then confirm AT returns OK and disable echo with ATE0.

  2. Unlock and check signal. AT+CPIN? must return +CPIN: READY; AT+CSQ RSSI must be non-99 (0-31 valid). Set AT+CFUN=1 if radio is off.

Read the full file on GitHub · 90 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago First seen · 90 lines · 56 tokens per session scan A a97892beb5b7

Subscribe to this mod's changes

cellular-at-modem-integration is a skill published in the GitHub repository easyzoom/aix-skills (31 stars, last pushed 1mo ago), licensed MIT. It adds 56 tokens to every session and 1,795 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Hardware and IoTagent-skillsai-agentsai-workflowsautomationclaude-skillscortex-m
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