So, i have a DFR Rover kit with blue tooth bee 2.0.
The BT work fine with AA battery pack but not with lipo battery. I have yet 3,3v between port 1 and 10 of the BT Bee but it doesn’t work !
Thank for your help.
Thank for your reply,
I have charge the lipo with the jumper and since i have remove it.
I have mesure the voltage :
With Lipo : VIN=4,13V ; +5V= 4,97V ; +3,3V=3,31V (same with jumper or not).
With AA : VIN=6,14V ; and the same for +5V and +3,3V.
Wath do you mean when you say “LiPo battery might have been drained”.
I’m French and I speak English like a Spanish cow, thank you for being indulgeant.
I’m having this problem with 4 robots. Each has a 6000mAh, 3.7 V LiPo battery. Should have sufficient charge. Checked the voltages on the Bluetooth card & they’re the same for AA battery power or LiPo and yet… The Bluetooth doesn’t work on LiPo. What gives? Noise from the regulator?
The setup is exactly as directed in the rover manual. The parts used are:
Product code : RB-Rbo-41
robotshop.com/ca/dfrobotshop-rover-tracked-robot-bluetooth-kit-8.html
Product code : RB-Spa-453
robotshop.com/ca/sfe-lithium-polymer-battery.html
Yes. It works… But it burns through batteries like crazy!!!
/a
Ya… That doesn’t help where we’re running 9 hours per day for 5 days.
We just finished doing robotics & programming with ArduBlocks with nearly 2500 Scouts (girls & boys) aged 10 to 14 over a 5 day period at the Scouts Canada Jamboree. Better get this fixed before the orders start coming in… And before we need to do this for the next set of kids. 
You should probably work on a “Robotshop UAV” as well… (Hint hint)
/a
Any update?
I was referring to the subject of the thread - the Bluetooth not working for the LiPo batteries.
We had this problem on all 4 of the units we had and all 4 6Ah batteries in various combinations.
I’m really surprised by this. As stated in my earlier post, I was using the 6Ah, 3.7V LiPo (Product code : RB-Spa-453 robotshop.com/ca/sfe-lithium-polymer-battery.html ) when I encountered this problem. Since the RB-Spa-453 is just a stack of 3 RB-Spa-556 in parallel I don’t see why it would fix the problem.
The battery was fully charged. The voltages on the pins of the XBee header (with the Bluetooth installed) were identical when using AA batteries (6 V nominal output) or the LiPo (3.7 V nominal output)… And that’s what I found puzzling. The only thing that occurred to me that might be happening was that the boost regulator might be introducing electronic noise when supplied by the LiPo that it’s not on AA. You’ll need an oscilloscope to check that.
I bought DFR Rover kit v.2 recently and have same issue - bluetooth Bee 2.0 working perfectly with AA battery pack but not with 2Ah LiPo battery. At the full charge I’m able to connect to bluetooth Bee 2.0 from laptop or smartphone but if I’ll turn rover of just a couple minutes later and turn it on again, I’m not able to connect to Bee 2.0 at all.
So I’m wondering what the options here? Could I just return battery? Or is there there other solutions?
Sounds like the LiPo battery might have been drained. Can you measure the voltage it’s providing? Note that when you connect the AA battery pack and the USB cable, you need to remove the jumper at the left rear of the board to prevent the onboard charger from charging the AA batteries as if they were LiPo.
Vous pouvez parler en Français ici - pas de problème. la batterie semble fonctionner correctement. Est ce que, quand vous branchez la batterie LiPo, le reste du circuit est alimentée? Avez-vous l’option de faire une vidéo montrant ce qui se passe et ce que vous faites?
Can you include photos of your setup and the RobotShop part numbers? If we can’t spot something in the setup, we’ll see if we can reproduce the issue on our end.
We were able to reproduce the issue on our end and we are working towards a solution.
In the meantime, can you confirm the Bluetooth module works using the AA battery pack (so at least you can continue using it in the meantime)?
It depends on the capacity of the AA batteries. Many Alkaline batteries are ~500mA, which is not a lot. Some rechargeable AA batteries are 2200mAh, which should allow for about 20-30 minutes of activity.
Always appreciate suggestions and ideas.
Wow. Welcome to robotics - most robots last only about 30 minutes to 1 hour on a decent battery. A multi-rotor lasts about 15 minutes and larger wheeled platforms can last a few hours max.