WB-MAP3E firmware changelog

Overview

Device firmware can be updated over Modbus; see the instructions.
This page lists changes since the beginning of 2022. Earlier changes are in Firmware Changelog.

Changelog

2.15.0 (07.09.2026)

2.14.0 (21.07.2026)

• Fixed Modbus issues:
  • ERRMODBUS008: Unexpected behaviour with long request frames
  • ERRMODBUS009: Unexpected behaviour when reading near address 0xFFFF in continuous-reading mode
  • ERRMODBUS010: Incorrect request validation and handling of invalid requests
  • ERRMODBUS011: Incorrect handling of invalid Fast Modbus event-configuration requests
• Added service coil register 65500 for LED testing.

2.13.1 (18.06.2026)

• Fixed saving the current peak detection period register (0x10F4).
• Improved Fast Modbus arbitration timing stability.

2.13.0 (08.06.2026)

• Added the current peak detection period register (0x10F4).
• Added enclosure LED indication for WB-MAP3EV.
• Fixed event loss when two devices on the same bus transmit events simultaneously ERRMODBUS007.

2.12.4 (12.05.2026)

• Fixed incorrect line-to-line voltage calculation when phase angles are unavailable ERRMAP0019
• Fixed incorrect voltage-to-current phase angle measurement when voltage is absent ERRMAP0022
• Fixed saving disconnected-phase detection and current-transformer inversion settings ERRMAP0021
• Improved disconnected-phase detection
• Optimised power-loss handling
• Added FlashFS diagnostic service registers
• Optimized memory use when requesting many registers

2.12.3 (05.03.2026)

• Fixed incorrect total power factor across multiple phases ERRMAP0020

2.12.1 (20.01.2026)

• Fixed model identification for matching WB-MAP3E and WB-MAP3ET templates.

2.12.0 (29.12.2025)

• Added stack and RAM monitoring service registers
• Added a service register for the last MCU reset cause
• Added a firmware update counter service register
• Added FlashFS diagnostic service registers
• Added the device batch number register
• Improved MCU supply voltage measurement accuracy on new devices
• Separate templates for WB-MAP3E and WB-MAP3ET.

2.11.0 (04.09.2025) — available in testing

• Added a register to restore default settings

2.10.8 (28.05.2025)

2.10.7 (04.04.2025)

• Internal production fixes

2.10.6 (04.04.2025)

• Fixed large initial energy counter values on new devices ERRMAP0016

2.10.5 (04.04.2025)

• Fixed power registers returning zero instead of actual values (observed on WB-MAP6S with ATM90E36A; these devices can now use the latest firmware)
• Fixed changing data in non-active power registers ERRMAP0015

2.10.4 (07.03.2025)

• Fixed unexpected behaviour when invalid values are written to some registers ERRMODBUS003
• Tested WB-MAP12H: these devices can now be updated to the latest firmware
• Improved components used in production functional testing

2.10.3 (26.02.2025)

• Simplified hardware by removing EEPROM
• Fixed extra pulses during I2C initialization (operation was unaffected)

2.10.2 (30.01.2025)

• Fixed loss of Modbus response under very frequent requests (observed on WB-MAP12E) ERRMAP0013

2.10.1 (14.10.2024)

• Added parity checking for received Modbus data ERRMODBUS006

2.10.0 (07.08.2024)

• Added software current transformer reversal, except on WB-MAP3ET and WB-MAP3EV
• Fixed replies to address 0xFD packets that did not contain Fast Modbus commands ERRMODBUS001
• Added register 119: minimum VDDA since power-on

2.9.0 (13.05.2024)

• Added big-endian energy registers

2.9.0 (13.05.2024)

• Added current registers in 0.01 A units and active power registers in 0.01 kW units

2.8.1 (06.02.2024)

• Fixed extremely rare possible freezes at power-on

2.8.0 (14.12.2023)

• Added events for Urms voltage registers
• Upeak registers now contain unsigned absolute values
• Fixed a line-to-line voltage calculation bug: ERRMAP00010
• Added register 131: enter the bootloader with current connection settings. Requires bootloader 1.3.0 or later.
• Fixed the response to discovery command 0x46 ERRMODBUS002
• Fixed uninitialised high bits in bit-field replies ERRMODBUS004

2.7.5 (08.11.2023)

• Fixed peak reset time units: ERRMAP0009

2.7.4 (25.10.2023)

• Fixed total power calculation: ERRMAP0008

2.7.3 (03.10.2023)

2.7.2 (20.09.2023)

2.7.1 (21.08.2023) — available in testing

2.7.0 (28.07.2023) — available in testing

• Fixed issues ERRMAP0003 and ERRMAP0004 for WB-MAP devices with the ATM90E36A chip.
• For three-phase ATM90E36A versions, fixed phase angles always reading zero.

2.6.3 (13.07.2023) — available in testing

• The control for disabling the workaround for ERRMAP0003 moved from register 101 to 102. Values are inverted: 0 disables it; 1 enables it (default).
• The workaround for ERRMAP0004is always active, regardless of registers 101 or 102.

2.6.2 (13.07.2023)

2.6.1 (07.07.2023)

• Added clearing of phase power when voltage readings are cleared on detecting the conditions described in ERRMAP0003 and ERRMAP0004), accounting for phase configuration in registers 0xn4A0–0xn4A2.
• Added clearing of phase power when voltage readings are cleared on detecting the conditions described in ERRMAP0003 and ERRMAP0004), accounting for phase configuration in registers 0xn4A0–0xn4A2.
• Clearing incorrect readings (workarounds for ERRMAP0003 and ERRMAP0004) can be disabled by writing 1 to register 101; its default value is 0, which enables the logic

2.6.0 (23.06.2023)

• For three-phase WB-MAP versions, detect nonzero voltage readings caused by incorrect meter wiring ERRMAP0003
• Fixed calculation of small RMS current and voltage values. ERRMAP0004
• Changed the error value from 0xFFFF to 0xFFFF FFFF when reading a voltage register for a phase not selected by registers 0xn4A0–0xn4A2. ERRMAP0006

2.5.2 (08.06.2023)

• Prevented accidental firmware writes over calibration registers ERRMAP0002

2.5.1 (06.04.2023)

• Fixed random device response delays ERRMODBUS01

2.5.0 (02.02.2023)

• Added line-to-line voltage registers

2.4.1 (05.12.2022)

• Minor Modbus fixes

2.4.0 (01.12.2022)

• Added support for the updated Modbus library and operation with the Wiren Board Modbus protocol extension

2.3.8 (28.09.2022)

• Added support for new EEPROM chips

2.3.7 (24.01.2022)

• Added internal MCU voltage and temperature registers.
• Added minimum input voltage since power-on register.

2.3.6 (12.01.2022)

• Added support for new FRAM chips