Communication stays with the team
The operating path is built between the equipment carried by team members rather than around continuous access to public network infrastructure.
CHATFIELD · LORA MESH OFF-GRID COMMUNICATION
LoRa mesh off-grid communication for teams beyond cellular coverage.
ChatField specializes in local team communication for places where cellular data, cell towers and Wi-Fi cannot be relied upon. We develop phone-paired LoRa mesh systems that keep PTT voice, text and voice messages, offline maps and team location moving between equipped teammates.
01 · CATEGORYOff-grid communication
Local team coordination continues without using a cellular tower, public Wi-Fi or a cloud data path.
02 · NETWORKLoRa mesh communication
Equipped devices communicate directly and can use up to two participating relay nodes to support a local multi-node path where the configured layout permits.
03 · INTERFACEPhone-paired operation
The smartphone remains the working interface for PTT, messages, offline maps and team location.
THE FIELD COMMUNICATION CATEGORY
What “LoRa mesh off-grid communication” means.
It is a local communication system for a defined team. Information travels from a phone to its paired radio terminal, then across LoRa links between equipped team members. Core local exchange does not depend on a mobile carrier or Wi-Fi access point.
Participating nodes form the network
Each equipped teammate is part of the local communication system. Node spacing and movement therefore matter to deployment quality.
Designed for low-data field exchange
The system carries operational information such as PTT voice, concise messages and reported positions—not general internet traffic.
Keep the familiar screen
The phone provides the app, map and controls. A paired radio terminal provides the LoRa link to the local team network.
Load what the operation needs
Pair devices, prepare offline maps, confirm the team configuration and check power before leaving normal coverage.
Test the real route
Terrain, structures, vegetation, radio interference, carrying position and team movement all affect actual performance.
WHY IT STILL WORKS OFF-GRID
The local path does not require a cellular tower.
The phone still performs the user-interface work when it is offline. Bluetooth connects the phone to a carried radio terminal, and LoRa links connect that terminal to equipped teammates.
- 1 · INTERFACEPhone
A team member starts PTT, sends a message or checks team information in the ChatField app.
- 2 · PAIRINGBluetooth link
The phone passes the operational data to its paired field communication terminal.
- 3 · LOCAL NETWORKLoRa mesh
The terminal sends the data directly or through a participating local node when the supported path requires it.
- 4 · DESTINATIONEquipped teammate
The receiving terminal delivers the information to the teammate’s paired phone.
Important boundary: “Off-grid” means the team’s core local communication path does not depend on cellular data or Wi-Fi. It does not mean satellite internet, public emergency dispatch, unlimited distance or guaranteed coverage in every terrain.
CURRENT CHATFIELD PRODUCT
J25 brings this communication model into the field.
J25 is ChatField’s current phone-paired LoRa mesh communication device. Each equipped teammate carries a J25 while using a paired smartphone as the interface.
PTT voice
Use the paired phone to start local push-to-talk voice exchange with equipped teammates.
Text and voice messages
Send concise operational information that the team can review again during the task.
Team location and offline maps
Exchange reported positions and work from map data prepared before leaving normal coverage.
Local SOS alert
Notify equipped teammates on the local mesh; this is not a connection to public emergency services.
DEPLOYMENT PLANNING FOR BUYERS
Range and network quality are field results.
A catalog distance cannot represent every deployment. Open terrain such as plains, open line-of-sight routes or areas with limited hills can support an ideal J25 communication distance up to 10 km; for real buyer trials, use around 5 km as the urban-obstructed field-test distance and evaluate relay-node placement, terrain, team movement and acceptance criteria before approving a configuration or volume order.
Country and radio configuration
Confirm the destination country, permitted configuration and required compliance documents before shipment.
Terrain and obstructions
Map valleys, vegetation, buildings, vessels, elevation changes and other obstacles on the real route.
Users, node spacing and relay points
Define the number of equipped teammates, expected separation, up to two relay-node positions and how positions change during the operation.
Information to be exchanged
Decide whether the operation needs PTT, messages, location, offline maps or local SOS—and who uses each function.
Representative acceptance route
Use sample units on a realistic route and record pass/fail points against agreed operational criteria.
Configuration and documents
Align product version, app compatibility, accessories, product PDF, compliance evidence and order quantity.
WHERE BUYERS EVALUATE IT
Professional communication beyond reliable coverage.
The same communication category can serve different field problems. Each market still requires its own route plan, configuration review and representative test.
Outdoor teams
Route-based work, expeditions and coordinated field activity outside dependable mobile coverage.
View solution →Remote worksites
Local coordination for distributed personnel where normal infrastructure is absent or unreliable.
View solution →Security patrols
Team communication across planned patrol routes, night operations and changing positions.
View solution →Marine operations
Nearshore and vessel-team coordination under a carefully evaluated deployment plan.
View solution →BUYER QUESTIONS
Off-grid communication, explained clearly.
Does ChatField require cellular service or Wi-Fi for local team communication?
No. The core local path uses a paired phone, Bluetooth and the LoRa mesh formed by equipped ChatField terminals. The phone can remain the interface while mobile data and Wi-Fi are unavailable.
Is ChatField a satellite communication system?
No. ChatField is a local LoRa mesh communication system. It does not provide satellite internet or a public-network connection.
Does each teammate need a communication terminal?
Each person who needs to participate in the local ChatField network should be equipped with a compatible terminal and paired phone. Team layout and node spacing should be planned around the real operating route.
What communication range should buyers plan for?
J25 can reach an ideal communication distance of up to 10 km in open terrain such as plains, open line-of-sight routes or areas with limited hills. For real procurement evaluation, use around 5 km as the urban-obstructed field-test distance, then verify terrain, structures, vegetation, interference, carrying position, radio configuration and up to two participating relay nodes on the representative route.
What should a buyer provide for a deployment review?
Provide the destination country, terrain and route, team size, expected spacing, required functions, sample quantity, estimated order quantity and document requirements.
START WITH THE FIELD PROBLEM
Tell us the country, terrain, team size and intended route.
We will align the J25 configuration, product documents and next evaluation step with your off-grid communication project.
Open B2B inquiry