Android SMS Gateway Scenario 1386: Real-estate scheduled SMS in practice

Summary

Scenario 1386 is HMO portable-appliance testing at T-5 09:00 tenant-local: visit notice out, access chase later, board CSV held until DLR drains. Service pricing is based on device count and total SMS sent through the gateway. You need a working Android phone with a SIM and SMS credit from your mobile operator. Operator message costs are yours—we do not sell carrier SMS balance.

If the tester is due in five days and the SMS is still behind “just listed,” you did not book access. You advertised the HMO.

Not a CodeCanyon “estate agent SMS” pack. Device meters apply — Twilio vs Android SMS gateway.

Key takeaways

• Scenario 1386 is HMO PAT-testing T-5 09:00 SMS — not listing, lettings, key day, rent T-3, HOA, open-house, auction, solicitor, gas-safety, valuation, inventory, EPC, keys-with-agent, void frost, meter-read, evening viewing, boiler, check-out, right-to-rent, AST T-28, snagging T-2, ground-rent T-7, or deposit T-10.
• A tester visit that fires at HQ noon after tenants already left for work is a clock fail, not a CRM nicety.
• Priced by devices and SMS send volume. You use your own phone and operator SMS credit. Free is 300 SMS lifetime, 1 device. Developer is 25,000 SMS per year.
• Starter is 2 devices; the HMO spare still counts.
• Hold board CSV until T-5 DLR drains.
• Canary the PAT SIM at 08:50, not at last night’s portal job.

Related reading

real estate SMS, scheduled SMS, how an Android SMS gateway works, HSE portable appliance testing.

Context

CRM marks T-5 at midnight UTC. Tenants read SMS at 09:00 local. Sales still wants a board CSV.

Free (300 SMS lifetime) is a rehearsal HMO. Developer is 25,000 SMS per year.

Core scenario guidance

09:00 is T-5 PAT, not gas-safety T-14. Timezone is the tenant, not the head office.

PAT clock roles

Cost and ownership

Priced by devices and SMS send volume. You use your own phone and operator SMS credit. The HMO spare is a billed device. Duplicate T-5 burns airtime.

Name a 08:30–10:30 on-call for test mornings, not only Saturday viewings.

Operations

08:50 canary. Abort: hold board CSV, keep portal OTP, skip a second “all HMOs” blast. Do not “resend block.”

Security and compliance

Short bodies. No room numbers plus full address in one SMS. Authenticate PMS hooks. Board lists are promotional.

Decision guide

Ship when 08:50 canary is green and clocks are tenant-local. Delay if phones lock in the office after 18:00. If handsets are forbidden, CPaaS for portal OTP.

Checklist

• PAT SIM paired overnight.
• 08:50 canary.
• Tenant locale, not HQ.
• Portal OTP isolated.
• Board CSV held.
• Airtime before 08:30.
• Battery exemptions.
• Idempotent T-5 keys.
• Test-morning on-call named.
• Device cap includes spare.

Next steps

Review device and SMS volume pricing, device setup, SMS API documentation.

Deep dive: production hardening

Cleaners unplugging USB at 08:20 is an outage at 09:00. Watch DLR, not PMS 200s.

Deep dive: scaling and failure modes

Multi-HMO test weeks add devices before inventing a hidden unlimited-handset SKU. Raise OEM ceilings; fair-use remains.

Deep dive: integration discipline

Idempotency on hmo_id + offset (t5|t1). MCP is a REST wrapper — live fields in Developer Center.

Priced by devices and SMS send volume. You use your own phone and operator SMS credit.

T-5 08:50 drill

Canary. Fire one T-5. Confirm DLR before board CSV. Hold listings during the wave.