Hi - as per the title,
My sons new mBot worked fine straight out of the box with the remote. The motors/wheels turn fine in both directions. However, whenever we try to connect using ipad or iphone via bluetooth, the connection seems fine but only one wheel will turn forwards so mBot goes round in circles - also happens with the remote, when bluetooth is connected.
Any advice or should i return for a replacement?
Thanks
That’s really odd. Can you post a screenshot of the program on the iPad?
Also, be sure to add @tec_support on questions like these. 
Hi Basshead,
When there is a Bluetooth connection, the robot mBoard need more power from the battery.
Please change the battery or fully charge the battery for the mBot have a try.
According to our test and research, it is suggested to use rechargeable Li-ion battery or rechargeable nickel-metal hydride, nickel-cadmium which can be bought from amazon or local shop. Or Alkaline battery with good quality like Energizer, DURACELL.
Once stillt the same issue after changed the proper battery, please reset default program for mBot with USB connection by mBlock 3.4.5 refer to this document.2.How to reset default program manually.docx.zip (677.9 KB)
then test with Bluetooth connection.
Please note: temporarily disconnect the Bluetooth while reset default program.