Certs verifiedCertification and firmware per model
Free samplesFirmware compatibility testing
Two optionsCommitted date plus alternate model
12 monthsWarranty · fakes paid 10x
COMMON CHALLENGES
Module problems surface a week before production
- Firmware and certification don’t matchThe firmware is not the version you expected, and the certification ID differs from your product filing.
- Packaging capacity slips without noticeModule deliveries are frequently pushed back, often with no advance warning.
- Easy to pick the wrong variantCat.1 versus Cat.4, or the wrong carrier band — one mistake makes the whole batch unusable.
- You need a firmware-compatible long-term pathModules iterate quickly, and redoing compatibility work every cycle is expensive.
POPULAR PART NUMBERS
Commonly stocked and commonly sourced
| Sub-category | Common part number families | Sourcing note |
|---|---|---|
| Wi-Fi / Bluetooth modules | ESP32-WROOM / ESP32-S3 · RTL8720 series | Modules or bare chips — modules save certification cost |
| Cellular modules | SIM7600 / SIM800 (SIMCom) · EC20 / EC25 (Quectel) | Confirm the standard (Cat.1 / Cat.4) and bands first |
| NB-IoT | Common NB-IoT module families | Carrier bands and certification differ — check each |
| GNSS | NEO-6M / NEO-M8N (u-blox) · common domestic GNSS modules | Confirm accuracy together with the antenna design |
| RF front-end | Common filters, PAs and switches | Match with the main module to avoid impedance mismatch |
| Antennas | Common PCB and external antenna specs | Antenna efficiency must be assessed with the enclosure |
Module suffixes determine band and certification version — send the full part number. Certification status follows the manufacturer’s latest declaration.
FAQ
Frequently asked questions
How do you confirm a module’s certification status?
We include the model’s certifications (CE / FCC / SRRC and others) and firmware version with the quote, and can provide manufacturer declarations on request.
Are cellular module lead times stable?
Common modules are stocked. For tight packages we offer both a committed date and an alternate model, so you are never left waiting.
Can you offer a firmware-compatible alternative?
Yes. We confirm firmware and minimum-system compatibility first, then provide samples for validation, including any AT command differences.
Related services
INQUIRY
Send your module list — we'll verify certs and firmware
Part number, standard and bands, quantity and target date are enough.