Firmware Release Notes

CP22 Documented Changes

Version Details:

CP22 version 5.9x B1 release notes.  July 24th 2026

1. Screen initialization is now protected against memory conflicts with earlier bootloader releases following a field update.

2. Scheduled check-in time is retained through power cycles for morning schedules. Default check-in time set to 5:30 AM.

3. Various improvements to PDP context recovery and network re-attachment following an APN or SIM change.

4. Removed M2M auto-reactivation behavior that conflicted with the Time Switch's own connection management.

CP22 version 5.4x B2 release notes.  Oct 21st 2025

1. Update to M2M reset subroutine. Time Switch now takes advantage of newer diagnostics and features available to the newer M2M hardware.

CP22 version 5.3x B2 release notes.  May 08th 2022

1. Updated the real-time relay state change subroutines to work more efficiently with newer M2M cellular radios.

2. Various improvements to check-in procedure to match updated backend communication.

CP22 version 5.1x B1 release notes.  Feb 12th 2022

1. Expanded the range of M2M cellular radio families the Time Switch is capable of interfacing with

CP22 version 4.8x B1 release notes.  Jun 22nd 2020

1. Added quick status command to streamline the contents of read commands.

2. Optimized SMS support code to improve the communication chain and decrease latency.

CP22 version 4.7x B1 release notes.  Mar 3rd 2020

1. Added baud rate detection code for connection to 4800 baud tr4 devices.

CP22 version 4.5x B2 release notes.  Feb 13th 2020

1. Added support of manual commands for relay 1 and relay 2 independent.

2. Added checksum diagnostic screen.

CP22 version 4.0x B1 release notes.  May 12th 2019

1. Special build version developed for calculating the azimuth of the sun for relay activation.

2. Renamed screen components to accommodate special release.

CP22 version 3.9x B2 release notes.  July 16th 2018

1. Removed deprecated AT commands from M2M communication library. 

CP22 version 3.8x B1 release notes.  Oct 17th 2017

1. New release eliminates the need to recylce M2M power as often as before.

2. M2M communication is verified through a background diagnostic.

3. Hundreds place in firmware version is now used to log the number of connection attempts.

CP22 version 3.70 B2 release notes.  Sep 21st 2017

1. Increases time between connection attempts.

CP22 version 3.70 B1 release notes.  Sep 19th 2017

1. New release improves reliability over M2M network.

2. Addition of repetitious connection attempts in the event of communication loss.

3. PDP context over the network is monitored via background diagnostics.

CP22 version 3.60 B1 release notes.  Aug 15th 2017

1. New release improves reliability over M2M network.

2. Consolidated changes between CP22 v. 3.21 and CP22 v. 3.30 to be handled by the same algorithm.

CP22 version 3.30 B1 release notes.  Mar 9th 2017

1. New release improves reliability over M2M network.

2. Added contingency for when connection to server is dropped.

CP22 version 3.21 B1 release notes.  Feb 23rd 2017

1. New release improves reliability over M2M network.

2. Added contingency for when PDP context over network is never marked.

CP22 version 3.20 B3 release notes.  Feb 17th 2017

1. Added interrupt vector for when PDP context over the network is reset.

CP22 version 3.20 B2 release notes.  Feb 12th 2017

1. Increases time between connection attempts.

CP22 version 3.20 B1 release notes.  Feb 6th 2017

1. New release improves reliability over M2M network.

2. Addition of provision for recycling M2M power.

3. PDP context over the network is marked via background operations.

FCBMx Documented Changes

Version Details:

FCBMx version 6.5x B1 release notes. Jul 04th 2026

1. Improved accuracy of AC flasher current averaging and adjusted fault thresholds to match.

2. Added knockdown input monitoring to the Current Sense Guardian.

3. Corrected LED alert conditions clearing when flash output is deactivated.

4. Battery monitoring state is now initialized at power-up.

5. Default check-in time set to 5:30 AM so units report in prior to configuration.

6. Scheduled check-in time is now validated before use.

7. Various improvements to PDP context recovery and network re-attachment following an APN or SIM change.

8. Removed M2M auto-reactivation behavior that conflicted with the Guardian's own connection management.

9. Added receive buffer overrun protection throughout the communication parser.

10. Memory reserved to protect against conflicts with earlier bootloader releases following a field update.

FCBMx version 6.1x B1 release notes.

1. Changed the M2M recovery command from ENHRST to CFUN when network registration is not reported.

FCBMx version 6.0x B1 release notes.

1. Added ENHRST command for M2M recovery when network registration is not reported.

FCBMx version 5.9x B1 release notes.

1. Added hardware to distinguish between dimming and a positive error condition in RRFBs, and altered LED alert monitoring in current monitoring devices to match.

2. Updated the AC Current Guardian to align with the DC Current Guardian and RRFB monitoring changes.

3. Updated Command Q handling to match new backend definitions, and updated RRFB countdown timing to work with external time-delay relays.

4. Added the ability for Guardians to respond autonomously to manual commands in the absence of an external flasher power source.

FCBMx version 5.8x B1 release notes.

1. Altered the hysteresis scale and removed the dependence on M2M internal temperature.

FCBMx version 5.7x B1 release notes.

1. Added dynamic hysteresis so variance tolerances scale across loads — lower tolerance at higher loads, higher tolerance at lower loads.

FCBMx version 5.6x B1 release notes.

1. Altered LED alert monitoring in current monitoring revisions to operate regardless of ambient temperature.

2. LED alert calculations now incorporate M2M internal temperature.

‍FCBMx version 5.5x B1 release notes.

1. Removed open-circuit detection from current monitoring revisions.

FCBMx version 5.4x B1 release notes.

1. Further changes to the RRFB alert monitoring algorithm.

2. Added Command S for remote calibration.

FCBMx version 5.3x B1 release notes.

1. Changed the measurement algorithm for RRFB alert monitoring.

FCBMx version 5.2x B1 release notes.

1. Changed calibration flash patterns.

2. Added a sliding tolerance scale for alarm conditions as load decreases.

3. Calibration button now also turns on the lights while calibrating.

FCBMx version 5.1x B1 release notes.

1. Added Command S for configuring flash time and flash patterns for LED outputs.

FCBMx version 5.0x B1 release notes.

1. First revision of the DC Current Monitoring Guardian.

‍FCBMx version 3.5x B1 release notes.

1. Added the GUARDIAN_DC_II revision, which uses an isolated VREF for battery voltage calculation and reads solar voltage on a separate analog input.

FCBMx version 3.0x B1 release notes.

1. Guardian can now communicate and bootload with the Bivocom family of M2M devices.

FCBMx version 2.0x B1 release notes.

1. Guardian now includes the bootloader, allowing firmware to be flashed over the air.

RTCG Documented Changes

Version Details:

RTCG version 5.0x B9 release notes. Jul 29th 2026

1. PDP context recovery and network re-attachment brought in line with the Time Switch and Guardian.

2. Corrected memory access on units with no equipment connected to either serial port.

3. Memory reserved to protect against conflicts with earlier bootloader releases following a field update.

RTCG version 5.0x B0 release notes. May 04th 2026

1. Corrected the daily check-in interval, which had been drifting from its 24-hour schedule.

2. Added M2M health monitoring with hourly registration checks and automatic recovery.

3. Gateway no longer drops a shared PDP context that other RTC equipment at the same site is using.

4. Added automatic APN selection based on the installed SIM, with per-field validation so manual configuration survives a reboot.

5. Improved serial handling between the radar and RTC equipment to eliminate contention on the shared line.

6. Added range checking throughout the communication parser.

RTCG version 4.0x B1 release notes.

1. Gateway now uses a 4 MHz crystal.

2. Improved serial switching between the radar and RTC equipment.

RTCG version 3.0x B1 release notes.

1. Gateway now sends SH and HI commands for compliance with both SS400 and DR600 devices.

2. Added the Bivocom M2M instruction set.

3. Gateway bootloader updated to match the Guardian and Time Switch over-the-air update structure.

4. Gateway now pushes settings to the radar at the conclusion of every communication with the server.

RTCG version 1.20 B1 release notes.

1. Settings are now pushed to the radar on every data change.

2. Added compatibility for CP22 relay code versions.

3. Communication with the M2M radio is suspended while reading the clock.

RTCG version 1.10 B1 release notes.

1. First release version.

‍RTCG version 1.08 B1 release notes.

1. Added variable reads from the clock to the radar.

2. Added semaphore handling to serial communication.

RTCG version 1.07 B1 release notes.

1. Corrected an issue that could stall minute handling.

RTCG version 1.06 B1 release notes.

1. Restored speed reporting to the radar sign.