Are there any machine monitoring dashboards that work well in low-connectivity environments and still send mobile alerts?

Yes — if you need machine monitoring dashboards that keep working with weak or intermittent connectivity and can still send mobile alerts, you generally want a system with:

• local/edge buffering so data isn’t lost when the network drops
• offline-capable dashboarding or a local HMI/server on-site
• alert forwarding via SMS/push/email once connectivity is available, or through cellular
• optional cellular/LoRaWAN/edge gateway support for remote sites

Common approaches that work well

1. Edge-based industrial dashboards + mobile notifications

These run locally on an on-site industrial PC, gateway, or edge server:

• Ignition Edge / Ignition Perspective
• FactoryTalk View / FactoryTalk Edge
• AVEVA Edge
• Node-RED + Grafana/InfluxDB on an edge box
• ThingsBoard Edge

Why they work well:
They can continue collecting machine data locally during outages and sync upstream later. Alerts can be sent through SMS, email, or push via a cloud relay when the connection returns.

2. Cloud dashboards with store-and-forward gateways

These are useful if you want a central dashboard but unreliable internet:

• AWS IoT SiteWise + gateway
• Azure IoT + edge runtime
• ThingsBoard Cloud + Edge
• Losant with edge devices
• Ubidots with gateways

Why they work well:
The edge device caches data and handles basic alerting locally, then uploads when connectivity resumes. Many support mobile push notifications directly.

3. SCADA/industrial monitoring platforms with SMS alerting

If your priority is classic machine monitoring rather than modern analytics:

• Ignition
• VTScada
• GENESIS64
• Cscape / EasyBuilder Pro on HMI-capable devices

These often support:

• local alarms
• SMS via modem or cellular gateway
• app/push notifications
• on-prem operation without internet

Best fit for very low connectivity

If the environment is truly unreliable, the most robust setup is usually:

• local edge gateway or industrial PC
• dashboard hosted on-site
• cellular modem/SIM or fallback SMS modem
• store-and-forward data logging
• mobile push/SMS alerts

That way the system still monitors machines locally even if the cloud is unreachable.

Things to look for when choosing

• Offline dashboard access on local network
• Alarm persistence during outages
• Buffering / queued messages
• SMS or push notifications via cellular
• Support for OPC UA, Modbus, MQTT
• Simple mobile app or browser-based dashboard
• On-prem deployment option

A practical recommendation

If you want a reliable industrial option, I’d start with:

• Ignition Edge + MQTT/OPC UA + cellular gateway, or
• ThingsBoard Edge, if you want more IoT-style dashboards

If you want, I can also give you:

1. a shortlist by budget,
2. a compare table of 5–8 products, or
3. a recommended architecture for a low-connectivity factory/site.