A useful IoT BOM connects the product's network, sensing and power requirements to exact components. Start with the required operating behavior, then include the supporting parts needed for assembly, programming and testing. A processor, wireless module and sensor list alone is not a production-ready BOM.
Define the network and sensing architecture
Decide whether the device connects directly to Wi-Fi, communicates through a Bluetooth gateway or needs another network. Espressif's ESP32-C3-WROOM-02 documentation describes Wi-Fi and Bluetooth LE modules with antenna variants. Select the exact variant and follow its placement requirements instead of treating every module carrying the same chip as identical.
List the physical quantities to measure, their accuracy requirements and sampling intervals. Include sensor power control, pull-up resistors and any required analogue conditioning. Reserve memory and processor time for networking, diagnostics and firmware updates as well as the core measurement task.
Build the power path around real operating states
Document sleep, measurement, communication and update states with their peak and average demands. Select the battery, input supply and regulators from that budget. Test radio current peaks and low-battery operation rather than designing only around a typical sleep-current figure.
If the product uses a rechargeable cell, charging and protection require a specific design review. Microchip's MCP73831/2 data sheet provides an example of a single-cell charge controller. The charger must match the battery and intended load-sharing arrangement; it should not be treated as the complete battery-management solution.
Include protection and factory access
Add connectors, protection components, test points, programming access and mechanical constraints to the BOM review. Keep the antenna clear of unsuitable metalwork and test it in the final enclosure. Identify components whose storage or assembly conditions need special handling.
For every line, record manufacturer, complete part number, quantity per board, package and approved alternatives. Mark optional or unpopulated parts clearly. Link the BOM revision to firmware, programming instructions and the test procedure so the contract manufacturer can build a repeatable configuration.
Frequently asked questions
Does a wireless module make the finished device automatically approved?
No. Review the module's integration conditions and the requirements for the final product and target markets. Antenna and enclosure changes can affect the remaining evaluation work.
What should an IoT BOM RFQ include?
Provide the controlled BOM, build quantity, required date and allowed alternatives. Identify any programming, labeling or documentation needs as separate requirements for confirmation.
Send SENICO your IoT BOM RFQ. Stock, price and lead time for each line require quotation confirmation.