COWTH™

broker.cowth.dev · 8883 TLS · 8084 WSS · 1883 lab-only
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2026-06-07 · lost 0/10000
MQTT :1883
QoS0 p990.479 ms
QoS1 p990.421 ms
MQTTS :8883
QoS0 p990.460 ms
QoS1 p990.462 ms
WS :8083
QoS0 p990.599 ms
QoS1 p990.467 ms
WSS :8084
QoS0 p990.603 ms
QoS1 p990.534 ms

8883 · MQTT 3.1.1/5 · TLS 1.2+
8084 · MQTT 3.1.1/5 · WSS
8083 · MQTT 3.1.1/5 · WS
1883 · Plain MQTT

Windows PowerShell
$env:COWTH_SANDBOX_CREDENTIAL_TOKEN = "token-from-dashboard"
cowthctl sandbox profile init --user somchai
Linux curl -fsSL https://download.cowth.dev/install.sh | sh
export COWTH_SANDBOX_CREDENTIAL_TOKEN="token-from-dashboard"
cowthctl sandbox profile init --user somchai

cowthctl sub --user somchai -t "sensors/#"
cowthctl pub --user somchai -t sensors/temperature -m "25.5"
cowthctl pub --loop --user somchai -t sensors/temperature -m "25.5" -l -i 0.1

MQTTX / Paho.js URL wss://broker.cowth.dev:8084/mqtt topic sandbox/<username>/test
mosquitto_sub -h broker.cowth.dev -p 8883 --cafile /etc/ssl/certs/ca-certificates.crt -u <username> -P <password> -t "sandbox/<username>/#"
mosquitto_pub -h broker.cowth.dev -p 8883 --cafile /etc/ssl/certs/ca-certificates.crt -u <username> -P <password> -t "sandbox/<username>/test" -m "Hello Cowth"

mosquitto_sub -h broker.cowth.dev -p 1883 -u <username> -P <password> -t "sandbox/<username>/#"
mosquitto_pub -h broker.cowth.dev -p 1883 -u <username> -P <password> -t "sandbox/<username>/test" -m "lab only"

1000
10/s
100

⚡ MQTT 3.1.1 / 5

🔐 TLS / WSS

⚙ QoS 0, 1 & 2

🔄 Session Persistence

📡 $SYS Topics

🇹🇭
+sensor/+/temp → sensor/room1/temp
#sensor/# → sensor/temp, sensor/a/b
+/++/+ → home/light
device/+/#device/+/# → device/esp32/sensor/temp
$SYS/#$SYS/broker/clients/connected