COVID-19 impact: We are still operating and shipping all orders! We are operating with a reduced staff, so for critical requirements, including fighting COVID-19, please contact us so we can identify priorities. Click here for more info.

Firmware update for the Micro Maestro to fix position update bug

Posted by David on 17 June 2019
Tags: maestro

We have released firmware version 1.04 for the Micro Maestro 6-Channel USB Servo Controller.

This update fixes a bug where receiving any serial command via TTL serial or the Maestro’s USB virtual serial port could potentially interfere with the Maestro’s servo update routine. The servo update routine is responsible for smoothly changing the position of each servo over time while respecting the Maestro’s configurable speed and acceleration limits. Because of the bug, receiving a serial command could cause position updates for some servos to happen too soon or to be skipped entirely. Repeated serial commands at high baud rates could also trap the Maestro in the servo update routine, causing it to become unresponsive.

This bug has been present since we first released the Micro Maestro almost 10 years ago in November of 2009, but its effects tend to be subtle, and we only learned about it a few weeks ago when a customer brought it to our attention.

This bug does not affect the 12-channel, 18-channel, and 24-channel Mini Maestros, so there is no corresponding update for them. The latest Mini Maestro firmware version is still 1.03.

For information about how to upgrade your 6-channel Micro Maestro, see the “Upgrading Firmware” section of the Maestro user’s guide.

0 comments

Post a comment

Using your Pololu account allows you to customize your avatar and manage your comments; you can also post anonymously.

New Products

Pololu Wheel for Standard Servo Splines (25T, 5.8mm) - 90×10mm, Black, 2-Pack
3.3V, 6.5A Step-Down Voltage Regulator D36V50F3
5V, 5.5A Step-Down Voltage Regulator D36V50F5
Pololu 400-Point Breadboard with Mounting Holes
150:1 Metal Gearmotor 37Dx73L mm 24V with 64 CPR Encoder (Helical Pinion)
Free Circuit Cellar magazine July 2019
Free Circuit Cellar magazine June 2019
Pololu Wheel for Micro Servo Splines (20T, 4.8mm) - 60×8mm, Black, 2-Pack
6V, 5.5A Step-Down Voltage Regulator D36V50F6
150:1 Metal Gearmotor 37Dx73L mm 12V with 64 CPR Encoder (Helical Pinion)
Log In
Pololu Robotics & Electronics
Shopping cart
(702) 262-6648
Same-day shipping, worldwide
Menu
Shop Blog Forum Support
My account Comments or questions? About Pololu Contact Ordering information Distributors