I’m struggling to understand why my RoR jumps and drops so significantly once I hit around 160-170? I just got the R2 and at first I was getting huge spikes at 160C and did some research noting I needed a firmware update. After that it seemed to go away but I’m struggling in the malliard phase to keep temp stable
We suggest updating to the latest firmware version, v165.
You can update using the web updater tool here:
bullet-r2-web-updater
After updating, please try another roast and let us know if the RoR spikes around 160–170°C still occur. Your feedback will help us confirm whether the issue is resolved.
Thank you.
Thanks for responding! I tried to download the v165 and I keep getting the same “failure to fetch” message.
I’m also receiving the same when attempting to download v165- “Download error: Failed to fetch”
I was able to download and update to v159 yesterday.



