# Bosch Sensortec BNO055 Firmware FAQs **URL:** \ **Category:** Sensors Transducers\ **Tags:** sensors-transducers, automation-and-control, faqs, bosch-sensortec\ **Created:** [January 14, 2020, 5:09pm UTC](https://forum.digikey.com/t/bosch-sensortec-bno055-firmware-faqs/5257 "2020-01-14T17:09:50Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![Kaili\_Simpson](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/kaili_simpson/32/4645_2.png) [@Kaili\_Simpson](https://forum.digikey.com/u/Kaili_Simpson)\ **Post date:** [January 14, 2020, 5:09pm UTC](https://forum.digikey.com/t/bosch-sensortec-bno055-firmware-faqs/5257/1 "2020-01-14T17:09:50Z")
This post will address frequently asked questions about the firmware for the [BNO055](https://www.digikey.com/product-detail/en/bosch-sensortec/BNO055/828-1058-1-ND/6136309) from [Bosch Sensortec.](https://www.digikey.com/en/supplier-centers/b/bosch-sensortec?_ga=2.263460172.1151833208.1578953869-55969596.1576280445) **Does the BNO055 come with preloaded firmware that is internally stored and automatically loaded by the bootloader?** The BNO055 has Firmware which is already loaded into the chip so you can directly use it without downloading the firmware again. **There is a section in the datasheet that talks about possible firmware updates. If there is a firmware update and I want to update my device, what pins do I need to be able to control?** To update the firmware of BNO055, you need to connect nBOOT\_LOAD\_PIN (pin 4), reset pin (pin 11) and protocol pin. Please see page 96 and 97 of the [BNO055 datasheet](https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bno055-ds000.pdf) for pinouts. All information was provided by [Bosch Sensortec’s Forum.](https://community.bosch-sensortec.com/t5/Bosch-Sensortec-Community/ct-p/bst_community) - [BNO055 firmware preloaded?](https://community.bosch-sensortec.com/t5/MEMS-sensors-forum/BNO055-firmware-preloaded/m-p/7599)