Why Does My August Smart Lock Pro Keep Dropping Off My Z-Wave Network?
- Battery-powered lock entering deep sleep dropping Z-Wave mesh route
- No Z-Wave repeaters between hub and lock extending mesh path
- Lock battery below 50 percent reducing Z-Wave radio transmission power
Problem Description
Your August Smart Lock Pro was successfully added to your Z-Wave hub but keeps disappearing from the Z-Wave network after hours or days of reliable operation. The lock shows as unreachable in your hub and automations fail until you manually wake the lock or re-interview it. Z-Wave mesh drops on battery-powered locks are caused by the lock going to deep sleep and the hub losing its mesh path, insufficient Z-Wave repeaters between the hub and the lock, or the lock Z-Wave radio interfering with nearby devices.
Symptoms
- August Smart Lock Pro shows as not reachable in Z-Wave hub after working fine
- Z-Wave automations for the lock fail with no route error
- Lock responds again after pressing the button on it but drops again within hours
- Z-Wave mesh shows lock connected then offline cycling repeatedly
- Lock performs correctly from the August app but Z-Wave hub cannot reach it
- Lock drops specifically overnight when no Z-Wave traffic is passing through it
Recognize these? Here's what usually causes it.
Common Causes
- Battery-powered lock entering deep sleep dropping Z-Wave mesh route
- No Z-Wave repeaters between hub and lock extending mesh path
- Lock battery below 50 percent reducing Z-Wave radio transmission power
- Lock Z-Wave network key mismatch requiring re-exclusion and inclusion
- Hub not sending Z-Wave keepalive messages for battery device
- Z-Wave interference from nearby smart switches or dimmers on same frequency
Most fixes happen in the first 3 steps.
Do not exclude the August Smart Lock Pro from Z-Wave while someone is inside a locked room. Exclusion temporarily disables Z-Wave control and if the physical lock mechanism has an issue during re-inclusion the door may not be unlockable remotely.
Tools & Requirements
Step-by-Step Solution
Add a Z-Wave Repeater Between Hub and Lock
Z-Wave battery devices like the August Smart Lock Pro rely on mains-powered Z-Wave devices acting as repeaters to maintain their mesh path. If there are no Z-Wave outlets, switches, or plugs between the hub and the lock location the signal path is direct and fragile. Add a mains-powered Z-Wave Plus device such as a Z-Wave smart plug in the room closest to the lock. After adding the repeater run a Z-Wave network heal from your hub settings to rebuild the mesh routes. The lock will route through the repeater for a more stable connection.
Replace the Lock Battery
The Z-Wave radio transmission power in battery devices decreases as the battery depletes. Even at 50 percent battery the August Smart Lock Pro may not transmit a strong enough Z-Wave signal to maintain its mesh path. Replace the lock batteries with fresh AA alkaline cells. After replacement the lock should maintain its Z-Wave presence more reliably. Check the battery level in the August app before and after replacement to confirm the reading updates.
Run a Z-Wave Network Heal
Go to your Z-Wave hub settings and run a Z-Wave network heal or optimize network. In SmartThings go to Z-Wave Utilities and Repair Z-Wave Network. In Hubitat go to Z-Wave Details and Repair All. In Home Assistant with ZHA go to Configuration then Zigbee Home Automation then Reconfigure. The network heal forces all Z-Wave devices to rediscover their optimal routing paths through the mesh. Run the heal at a time when all Z-Wave devices are powered and operational. The heal can take 10 to 30 minutes for large networks.
Re-Exclude and Re-Include the Lock
If the lock still drops after adding a repeater and healing the mesh exclude it from the Z-Wave network and re-include it. Put the hub in Z-Wave exclusion mode and press the August lock button 3 times to exclude it. After exclusion put the hub in inclusion mode and press the August lock button 3 times to include it. During inclusion stand within 1 metre of the hub. Re-inclusion with proper proximity establishes a clean network key exchange and full security negotiation that resolves persistent routing failures.
Switch to S0 Security if Using S2
Some Z-Wave hubs that include the August Smart Lock Pro using S2 Authenticated security experience intermittent drops because the S2 security handshake overhead on a battery device causes the lock to drop the connection during keepalive cycles. In your hub Z-Wave device settings for the lock check the security level. If S2 is shown try excluding and re-including with S0 security or no security. This trades some encryption overhead for a more stable mesh connection particularly in environments with multiple Z-Wave devices.
Quick Solutions
Still having issues? This is usually the deeper cause below.
If the keypad rejects valid codes, a lockout timer may be running — five failed entries locks most keypads silently for 5–10 minutes.
Place a Z-Wave smart plug on each floor of your home as a permanent repeater infrastructure. This ensures any battery Z-Wave device added anywhere in the home has reliable mesh coverage without requiring device-specific troubleshooting.
Most smart lock failures people label as hardware issues turn out to be a code wiped during a sync, or a setting reset nobody remembers triggering.
- Battery-powered lock entering deep sleep dropping Z-Wave mesh route
- No Z-Wave repeaters between hub and lock extending mesh
- Lock battery below 50 percent reducing Z-Wave radio transmission
- Lock Z-Wave network key mismatch requiring re-exclusion and inclusion
- Hub not sending Z-Wave keepalive messages for battery device
Before you go — try one of these (they fix most cases).
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Official Manufacturer Manual
If you need the complete manufacturer documentation for advanced setup, wiring diagrams, or detailed specifications, you can download the official manual below. The manual includes full technical instructions directly from the manufacturer and may help if your issue requires deeper troubleshooting.
Download the Official August Smart Lock Pro ManualSource: august.com
Need More Help? August Home Support
Note: The contact information below connects you directly to August Home's official customer support team, not Trunetto. They can help with warranty claims, device replacements, and advanced technical issues.
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