Release Notes for EN2M - Main Firmware
This article lists the release notes of the EN2M (Main Processor) Firmware (500-1009). This firmware controls the major functions of PBS operation.
This firmware is no longer being developed. However, the latest firmware can be found at this link:
Product applicability
Applies to model EN2 PBS (Push Button Station for 2W EZComm Navigator) only.

Filename: 500-1009XZZ.en2m (X is the Major Value, ZZ is the Revision Value).
Note: Firmware can only be updated using the EZ APS ToolBox PC application and a USB (Type A to B) cable plugged directly into the bottom of the EN2.
EN2M v4.15 (2015-09-23)
Critical Update
- Remove Alt Config feature controlled by GP Input to eliminate false triggering
- Fix update all - fails when using CONFIG due to extra write time for Locate Vol Min backup if additional items are included done in section update2w - backup not written until end
EN2M v4.14 (2015-03-17)
- Add backup eeprom location for Locate Tone Min (address 4) to tolerate unexpected corruption of value at address 4:
- Use address 44 for backup location
- If value at 4 is out of range, copy value from 44
EN2M v4.13 (2014-09-25)
- Add counter to channel check function
- Must miss 3 in a row to set ID to none
- Fix Jael issue where Walk Ping Pong gets out of step if Info Message is playing when Walk starts
- Add config offset to audio volume reads to fix issue where volume does not change with Calendar event
- Restore confignum at end of CCU config read to fix issue leaving wrong config after read
- Change walk message repeat limit from 25 to 60 for walk sound timer set to full walk
- Turn mute pin off for internal amp when USB connected
EN2M v4.10 (2013-05-23)
- Special test version for Migma
- Makes ext button input dual function
- Enables locate tone when active
- Places call with a open period of 100-500ms while active
- Fix 3 issues, starting with latest version sent to Migma
- 1 - Issue canceling mute when extpushOption in effect
- 2 - Issue preventing second Walk (Waterloo option) if extd push during Walk
- 3 - Play Confirmation sound before Info Msg for Migma call
EN2M v4.09 (2012-10-24)
Critical Update
- SP1 Release
- Disable Button Down accepted during Walk
- Fix issues found in test cases 514, 515
- Second walk does not end properly
- Fix no second Walk epp mute when pushed during walk rest
- Adjust timing inside latchtimer to fix btn-dn getting lost when epp on
EN2M v3.30 (2012-02-24)
- Wait for sp1 (improvements to readword section to help readability and exclude noise (EN2 mode only))
- Fix Locate Tone 3 plays Tone 4
- Wait for sp1 (add delay at beginning of readword sub to address bad read causing screaming PBSs)
- Fix issue requiring extra Extended Push after Walk starts (wst = ext push, svr - button push)
EN2M v3.29 (2011-11-02)
- Delete codes for volume override in EN2 CCU input section
- Stops screaming version
EN2M v3.28 (2011-10-24)
- Fix PingPong not working
- Bit variables should have been changed to bytes
- Add delay time before button enable at beginning of Walk Rest Mode
- Changes button inhibit delay time after Walk to 0.5 seconds
EN2M v3.26 (2011-09-16)
- Renamed version
EN2M v1.26 (2011-07-29)
- Fix bug caused by v1.24:
- Button disabled by skipping Clearance
EN2M v1.25 (2011-07-27)
- Added delay to button enable at beginning of Clearance
- Turn on buttonhold at start of Walk
- Added turn on buttonhold at start of Info Message
EN2M v1.23 (2011-03-10)
Initial Release
- Further adjustments to volume levels
- Reduce by 4dB at 55dBA ambient and up