RAK3401 WisBlock (1W Booster)
868 MHz
915 MHz
SX1262 + SKY66122 1W-PA
nRF52840
30 dBm
DIY Modules
High-Performance
nRF52840-based WisBlock Core module (RAK3401) combined with the RAK13302 1W LoRa amplifier module (SX1262 + SKY66122 PA + SAW filter). TX power up to 30 dBm (1 W). Integrated SAW filter also improves receive sensitivity. Requires a WisBlock Base Board (e.g., RAK19007). Pre-installed with Meshtastic; MeshCore v1.12.0 or later. Community firmware: Companion BLE, Repeater, Room Server. Legal only on US915 (high power).
Hardware Specifications
MCU
nRF52840
RAM
256 KB
Flash
1 MB
Display
Optional via WisBlock
Button Count
1
Has LEDs
true
Weight
8 g
Dimensions
30 x 20 x 5 (Core)
LoRa Specifications
LoRa Chip
SX1262 + SKY66122 1W-PA
Frequency Band
868 MHz, 915 MHz
Max. TX Power
30 dBm
Antenna Type
SMA (via Base Board)
Typical Range
22 km
Connectivity
WiFi
false
Bluetooth
true
GPS
false
Power
USB Type
USB-C (via Base)
Battery Connector
WisBlock Battery Connector
Solar Support
true
Power Consumption (Idle)
15 mA
Power Consumption (TX)
350 mA
Firmware Support
meshcore-dev/MeshCore
Official
Release notes: https://blog.meshcore.io/2026/08/14/release-1-17-1
Release notes: https://blog.meshcore.io/2026/08/14/release-1-17-1
Release notes: https://blog.meshcore.io/2026/08/14/release-1-17-1
Release notes: https://blog.meshcore.io/2026/08/14/release-1-17-1
mattzzw/MeshCore-Evo
Community
⚠️ Check that radio.rxgain(on) and flood.advert.base (0.308) are set correctly after flashing! ⚠️
This build is based on official MeshCore 1.15.0 dev branch (as of 25-May-2026 and additionally includes the following unmerged upstream PRs/changes:
- PR2553: Limit flood advert packet forwarding -->
set flood.advert.base 0...1(0: no flood adv. forwarding, 0.308: default, 1: all flood adv. forwarding) - PR1810: Allow direct message paths when denyf * is set
- :new: PR1727: Use hardware channel activity detection for checking interference --> Use
set int.thresh 1to activate hw based channel activity detection. - :new: PR2377: Disable NRF52 undervoltage bootlock feature
- Flood adverts are disabled (flood.advert.interval set to 0) by default
- :new: modified PR1810 to not block flood adverts but only
PAYLOADTYPEGRPTXTandPAYLOADTYPEGRPDATAso that some limited flood advert distribution can be managed via PR2553 to support e.g. observer maps.
- Based on
devv1.15.0 as of 25-May-2026
IoTThinks/EasySkyMesh
Community
Built for long off-road adventures and harsh winter conditions
- Based on MeshCore 1.17.1 mainline.
- Developed by IoTThinks and tested by our supportive MeshCore friends.
- Contribution to MeshCore: By IoTThinks%20is%3Apr%20author%3A%40IoTThinks).
- Source code: https://github.com/IoTThinks/MeshCore/tree/PowerSaving-v17
- With contributions from Dom4n and MeshCore friends
Notices:
16 Sep 2026: PowerSaving 17.1.5- Disabled automatic light sleep for USB Companion on ESP32 for better serial connectivity.
- Imported a fix for RAK 3401 battery variant from MeshCore dev. If there is no GPS module, 5V power to the LoRa 1W will be floating and unable to provide maximum TX power as expected. Thanks Mr. Martenumberto for your discovery and persistence.
- Added BSEC for BME680 on RAK 3401
- (Repeater) RXPSv2: Better power consumption for "set radio.rxps balanced". You can now use "set radio.rxps max". All CLIs are at RXPS CLIs
- (Companion) RXPSv2 is enabled by default with powersaving on.
- (Repeater) Added support of button press for ESP32 repeaters with powersaving on
- (Repeater) Fixed crash if doing "gps" on ESP32 repeaters without GPS module
- (Companion) Moved uptime to below battery icon. Shifted dots left.
- (Repeaters and sensors) Added "If GPS on after powersaving on", telemetry request will trigger GPS update"
- (Sensors) Added MCU temperature
- (Sensor) Added PowerSaving for sensor firmware
- Added Tracker v2 and T-Deck
- Added heltec
Custom Development and Partnership
If you want custom development for your projects, Contact Us Looking for Partnership? Discuss PartnershipSupport PowerSaving?
Support the development via  or . Buy boards with a coupon and help support ongoing development.Instruction:
- Flash Custom Firmware as in INSTRUCTION. 👈
- Scroll down to bottom to download uf2 / upgrade.bin to upgrade or freshInstall-merged.bin for new devices. 👈
- Heltec v4 bin files is for both Heltec v4.2 and v4.3. Heltec v4.3 bin files is for Heltec v4.3 only
- Heltec v4.3 and T096 have two options FEM RXgain on and FEM Rxgain off.
- If for board build or support, please ask us at GITHUB or Discord
Quick Usage
Repeaters / Room servers
All PowerSaving features are disabled by default and persisted across reboots. PowerSaving:powersaving on, powersaving off and powersaving
GPS PowerSaving: powersaving on then gps on and gps.
RX PowerSaving: set radio.rxps balanced and get radio.rxps. Repeaters with RXPS enabled are less affected by noises from cell towers. It may due to LoRa RX only wakes up periodically.
Added Battery voltage and PowerSaving status to repeater OLED
Set dark theme for Heltec T096.
For Heltec v4.3, 4.3R8, T096 and Tracker v2, you may set FEM off to save 10mA: set radio.fem.rxgain off
BLE / USB Companions
All PowerSaving features are enabled by default. GPS PowerSaving is enabled when you enable Position in MeshCore app. Added uptime for all companions. Set dark theme for Heltec T096.- For Heltec v4.3, 4.3R8, T096 and Tracker v2, you may use femoff version to save 10mA.
Complete Guides in Wiki
Check the PowerSaving Wiki for more details:- All the features
- All CLI commands
- How it works
- Test results
Built for long off-road adventures and harsh winter conditions
- Based on MeshCore 1.17.1 mainline.
- Developed by IoTThinks and tested by our supportive MeshCore friends.
- Contribution to MeshCore: By IoTThinks%20is%3Apr%20author%3A%40IoTThinks).
- Source code: https://github.com/IoTThinks/MeshCore/tree/PowerSaving-v17
- With contributions from Dom4n and MeshCore friends
Notices:
16 Sep 2026: PowerSaving 17.1.5- Disabled automatic light sleep for USB Companion on ESP32 for better serial connectivity.
- Imported a fix for RAK 3401 battery variant from MeshCore dev. If there is no GPS module, 5V power to the LoRa 1W will be floating and unable to provide maximum TX power as expected. Thanks Mr. Martenumberto for your discovery and persistence.
- Added BSEC for BME680 on RAK 3401
- (Repeater) RXPSv2: Better power consumption for "set radio.rxps balanced". You can now use "set radio.rxps max". All CLIs are at RXPS CLIs
- (Companion) RXPSv2 is enabled by default with powersaving on.
- (Repeater) Added support of button press for ESP32 repeaters with powersaving on
- (Repeater) Fixed crash if doing "gps" on ESP32 repeaters without GPS module
- (Companion) Moved uptime to below battery icon. Shifted dots left.
- (Repeaters and sensors) Added "If GPS on after powersaving on", telemetry request will trigger GPS update"
- (Sensors) Added MCU temperature
- (Sensor) Added PowerSaving for sensor firmware
- Added Tracker v2 and T-Deck
- Added heltec
Custom Development and Partnership
If you want custom development for your projects, Contact Us Looking for Partnership? Discuss PartnershipSupport PowerSaving?
Support the development via  or . Buy boards with a coupon and help support ongoing development.Instruction:
- Flash Custom Firmware as in INSTRUCTION. 👈
- Scroll down to bottom to download uf2 / upgrade.bin to upgrade or freshInstall-merged.bin for new devices. 👈
- Heltec v4 bin files is for both Heltec v4.2 and v4.3. Heltec v4.3 bin files is for Heltec v4.3 only
- Heltec v4.3 and T096 have two options FEM RXgain on and FEM Rxgain off.
- If for board build or support, please ask us at GITHUB or Discord
Quick Usage
Repeaters / Room servers
All PowerSaving features are disabled by default and persisted across reboots. PowerSaving:powersaving on, powersaving off and powersaving
GPS PowerSaving: powersaving on then gps on and gps.
RX PowerSaving: set radio.rxps balanced and get radio.rxps. Repeaters with RXPS enabled are less affected by noises from cell towers. It may due to LoRa RX only wakes up periodically.
Added Battery voltage and PowerSaving status to repeater OLED
Set dark theme for Heltec T096.
For Heltec v4.3, 4.3R8, T096 and Tracker v2, you may set FEM off to save 10mA: set radio.fem.rxgain off
BLE / USB Companions
All PowerSaving features are enabled by default. GPS PowerSaving is enabled when you enable Position in MeshCore app. Added uptime for all companions. Set dark theme for Heltec T096.- For Heltec v4.3, 4.3R8, T096 and Tracker v2, you may use femoff version to save 10mA.
Complete Guides in Wiki
Check the PowerSaving Wiki for more details:- All the features
- All CLI commands
- How it works
- Test results
Built for long off-road adventures and harsh winter conditions
- Based on MeshCore 1.17.1 mainline.
- Developed by IoTThinks and tested by our supportive MeshCore friends.
- Contribution to MeshCore: By IoTThinks%20is%3Apr%20author%3A%40IoTThinks).
- Source code: https://github.com/IoTThinks/MeshCore/tree/PowerSaving-v17
- With contributions from Dom4n and MeshCore friends
Notices:
16 Sep 2026: PowerSaving 17.1.5- Disabled automatic light sleep for USB Companion on ESP32 for better serial connectivity.
- Imported a fix for RAK 3401 battery variant from MeshCore dev. If there is no GPS module, 5V power to the LoRa 1W will be floating and unable to provide maximum TX power as expected. Thanks Mr. Martenumberto for your discovery and persistence.
- Added BSEC for BME680 on RAK 3401
- (Repeater) RXPSv2: Better power consumption for "set radio.rxps balanced". You can now use "set radio.rxps max". All CLIs are at RXPS CLIs
- (Companion) RXPSv2 is enabled by default with powersaving on.
- (Repeater) Added support of button press for ESP32 repeaters with powersaving on
- (Repeater) Fixed crash if doing "gps" on ESP32 repeaters without GPS module
- (Companion) Moved uptime to below battery icon. Shifted dots left.
- (Repeaters and sensors) Added "If GPS on after powersaving on", telemetry request will trigger GPS update"
- (Sensors) Added MCU temperature
- (Sensor) Added PowerSaving for sensor firmware
- Added Tracker v2 and T-Deck
- Added heltec
Custom Development and Partnership
If you want custom development for your projects, Contact Us Looking for Partnership? Discuss PartnershipSupport PowerSaving?
Support the development via  or . Buy boards with a coupon and help support ongoing development.Instruction:
- Flash Custom Firmware as in INSTRUCTION. 👈
- Scroll down to bottom to download uf2 / upgrade.bin to upgrade or freshInstall-merged.bin for new devices. 👈
- Heltec v4 bin files is for both Heltec v4.2 and v4.3. Heltec v4.3 bin files is for Heltec v4.3 only
- Heltec v4.3 and T096 have two options FEM RXgain on and FEM Rxgain off.
- If for board build or support, please ask us at GITHUB or Discord
Quick Usage
Repeaters / Room servers
All PowerSaving features are disabled by default and persisted across reboots. PowerSaving:powersaving on, powersaving off and powersaving
GPS PowerSaving: powersaving on then gps on and gps.
RX PowerSaving: set radio.rxps balanced and get radio.rxps. Repeaters with RXPS enabled are less affected by noises from cell towers. It may due to LoRa RX only wakes up periodically.
Added Battery voltage and PowerSaving status to repeater OLED
Set dark theme for Heltec T096.
For Heltec v4.3, 4.3R8, T096 and Tracker v2, you may set FEM off to save 10mA: set radio.fem.rxgain off
BLE / USB Companions
All PowerSaving features are enabled by default. GPS PowerSaving is enabled when you enable Position in MeshCore app. Added uptime for all companions. Set dark theme for Heltec T096.- For Heltec v4.3, 4.3R8, T096 and Tracker v2, you may use femoff version to save 10mA.
Complete Guides in Wiki
Check the PowerSaving Wiki for more details:- All the features
- All CLI commands
- How it works
- Test results
MichTronics/MeshCoreNG
Community
Full Changelog: https://github.com/MichTronics/MeshCoreNG/compare/bridge-tcp-v1.0.5...repeater-v1.0.1
Full Changelog: https://github.com/MichTronics/MeshCoreNG/compare/bridge-tcp-v1.0.5...companion-v1.0.1
Full Changelog: https://github.com/MichTronics/MeshCoreNG/compare/bridge-tcp-v1.0.5...companion-v1.0.1
Full Changelog: https://github.com/MichTronics/MeshCoreNG/compare/bridge-tcp-v1.0.5...room-server-v1.0.1
Automatic sync from different repositories
Links
Purchase Links
https://store.rakwireless.com/products/wismesh-1w-booster-starter-kit
Links to online shops are subject to change. We do not guarantee that these links will remain accessible.
MCU
nRF52840
Memory
RAM:
256 KB
Flash:
1 MB
LoRa Chip
SX1262 + SKY66122 1W-PA
Max. TX Power
30 dBm