Electronics > Projects, Designs, and Technical Stuff
Pre-certified Bluetooth module for mass production
tszaboo:
Ah, yeah, and CE + CE != CE in theory.
In practice, if you use a pre-certified module, and you keep the power levels down, you could skip the entire RF testing (for CE, not FCC). It really depends on the equipment, and doing the testing anyway might be cheaper.
RED might even be skipped, it is applicable to higher power transmitters.
My point is, first step you need to identify which standards are applicable, needs testing, etc.
Write down on a paper, do a planning, get a signature from your boss, that these are the only tests that need to happen and only stuff I need to comply with. Do this as the first step of the project.
Psi:
--- Quote from: ogden on July 29, 2019, 10:22:41 am --- you never pick module without on-board antenna.
--- End quote ---
Yes, thanks. I forgot to mention that.
It will never have full certification without one though.
ChristopherN:
Hi,
I would recommend using BLE as well, Classic support is not as good as it once was. That said, it will be very hard to get current modules for $2. I just got quotes for one project with 100k/year and we're still at around 3,50€ for a fully certified module with BT5 and some processing power from western manufacturers.
Two main ways for cost saving can be:
* Moving the application to the module, most modules have plenty of processing power and memory.
* Use something from Espressif (ESP8266 /ESP32).
If you want to use the Bluetooth logo you have to register with the SIG in some cases, there are rumors that certifying modules with 4.2 will get more expensive over time.
BR
Christopher
SiliconWizard:
--- Quote from: angust_uk on July 29, 2019, 09:20:23 am ---
--- Quote from: Pinkus on July 29, 2019, 08:41:26 am ---Mmmh- why?
You will have to certify your complete solution anyway. No matter if you are using anything pre-certified or not - it won't help you in any way (but peace of mind... though only temporarily).
So ... avoid the hassle with looking for already pre-certified stuff. Itwill not help you in any way, as at then end, only your final device matters. And believe me, it can fail easily even if build using only pre-certified modules.
--- End quote ---
Not entirely - using a pre-certified module significantly reduces the cost of EMC testing and removes the need to carry out Bluetooth SIG's tests which are quite costly! Of course the device will have to be tests as a whole, but as stated by voltsandjolts the risks of failure are less if the module is pre-tested.
--- End quote ---
Agree with this. Just don't expect it to be a picnic though, using a pre-certified module will indeed make things a bit easier, but the RED directive still is a PITA. I suggest thoroughly reading the part that explains the different use cases (type of device, RF modules vs directly integrated RF, modules that are permanently connected to the device, or modules that can be put/removed by the user - yes it makes a difference - etc.)
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