SN Command — Serial Number

Query the device’s electronic serial number (SN), assigned during manufacturing for hardware traceability.

What is it for?

The SN command allows you to obtain the manufacturing identifier for:

📋 Warranty management — Equipment registration and validation
🔍 Traceability — Tracking from manufacturing
✅ Validation — Verify original Rinho products
🔧 Technical support — Identification in RMA tickets
📊 Inventory — Hardware control

The SN is unique for each device and does not change even if the cellular module is replaced.

Syntax

Action	Command	Response
Query	`QSN`	`RSN xxx...xxx` (24 hex characters)

Practical Examples

Basic query


>QSN<
>RSN3459343937350604000B006B;ID=974862;*6D<  // SN: 3459343937350604000B006B

SN breakdown

Section	Bytes	Description
Prefix	`34593439`	Production identifier
Batch	`37350604`	Manufacturing date/batch
Sequential	`000B006B`	Unique sequential number

SN by Model

Rinho Spider IOT


>QSN<
>RSN5350494445523031323334;ID=123456;*1A<  // "SPIDER012344" in ASCII

Rinho Smart IOT


>QSN<
>RSN534D415254303030313233;ID=654321;*2B<  // "SMART000123" in ASCII

Rinho C5


>QSN<
>RSN4335303032303135303630;ID=974862;*3C<  // "C5002015060" in ASCII

SN vs IMEI — Differences

Characteristic	SN (Serial Number)	IMEI
Identifies	Device hardware	Cellular module
Format	Hexadecimal (24 chars)	Decimal (15 digits)
Assigned by	Rinho manufacturer	Modem manufacturer
Main use	Traceability, warranties	Mobile operators
Changes if…	Never	Modem is replaced
Command	`QSN`	`QIMEI`

After replacing a cellular module, the SN remains the same but the IMEI changes.

Hex to ASCII Conversion

Some SNs represent readable text:


# Python
sn_hex = "5350494445523031323334"
sn_ascii = bytes.fromhex(sn_hex).decode('ascii')
print(sn_ascii)  # "SPIDER012344"


# PowerShell
$sn = "5350494445523031323334"
$bytes = [byte[]]::new($sn.Length / 2)
for ($i = 0; $i -lt $sn.Length; $i += 2) {
    $bytes[$i/2] = [Convert]::ToByte($sn.Substring($i, 2), 16)
}
[System.Text.Encoding]::ASCII.GetString($bytes)  # "SPIDER012344"

Use Cases

Technical support registration


// 1. Query SN
>QSN<
>RSN3459343937350604000B006B;ID=974862;*6D<
 
// 2. Query IMEI
>QIMEI<
>RIMEI865851037974862;ID=974862;*4D<
 
// Data for ticket:
// - SN: 3459343937350604000B006B
// - IMEI: 865851037974862

Verify modem replacement


// Before replacement
>QSN<
>RSN3459343937350604000B006B;ID=974862;*6D<  // Same SN ✓
>QIMEI<
>RIMEI865851037974862;ID=974862;*4D<         // Old IMEI
 
// After replacement
>QSN<
>RSN3459343937350604000B006B;ID=974862;*6D<  // Same SN ✓
>QIMEI<
>RIMEI865851038012345;ID=974862;*5A<         // New IMEI ✓

Compatibility

Model	Minimum Version
Rinho Spider	v1.03.00
Rinho Ultralite	v1.03.00
Rinho Minitrack	v1.03.00
Rinho C3	v1.03.00
Rinho C5	v1.03.00
Rinho Spider IOT	v1.00.00
Rinho Smart IOT	v1.00.00
Rinho Zero IOT	v1.00.00