Joshua's Docs - CC2541 and HM-X Notes

cc2541 vs HM-10 / HM-#

The HM-# line of boards are essentially just pre-built modules that combine the dedicated BLE IC (usually a CC2540 or CC2541) with all the basic stuff that it needs to get running; timing crystal, ground plane, antenna trace, various pull-up/pull-down resistors on pins, etc. Plus it breaks out the super tiny pins on the TI chips to much larger contacts that almost fit a standard breadboard.

There are a bunch of HM-X clones / forks, including open-source SparkFun variants (HM-13). The original designs, and original IP holder, all seem to point to Jinan Huamao.

These boards are wildly popular, so it is often easier to find guides for "HM-10 projects" rather than "CC2541 projects".

HM-10 & HM-11 [VS] HM-12 & HM-13

HM 10-11 are V4.0 BLE, whereas HM 12-13 are dual-mode EDR 4.0 and BLE 4.0.

Hard to tell: It also looks like the HM-12 and HM-13 pairs the actual bluetooth SOC with another full processor, the NuMicro NUC029, which would certainly explain the jump in flash from 256Kb with the HM-10/11 to 64KB (512 Kb) with the HM-12/13.

Docs and Resources

What Type Links
Official Datasheet PDF Datasheet TI hosted
Software Dev Guide PDF Guide TI hosted
BLE Dev Kit Git repo of sample stuff related to getting started with HM-10/CC2541 Github

Can you put your programs directly on the CC2541?

Yes, but in general not worth the time & money unless building a large-scale commerical product. Requires expensive licensed TI software (IAR Embedded Workshop) and specialized programmers (CC Debugger). See this for details.

Also see:

Markdown Source Last Updated:
Sun Mar 15 2020 17:55:11 GMT+0000 (Coordinated Universal Time)
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Sun Mar 15 2020 17:55:11 GMT+0000 (Coordinated Universal Time)
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