Supported RS-485 Sensors

ZTS Zhaotaisheng

Model	Moist.	Temp.	EC	pH	N	P	K	Salin.	TDS	Conf.
ZTS-3000-TR-WS-N01	✓	✓	–	–	–	–	–	–	–	0.95
ZTS-3000-TR-ECWS-N01	✓	✓	✓	–	–	–	–	–	–	0.95
ZTS-3000-TR-PH-N01	–	–	–	✓	–	–	–	–	–	0.95
ZTS-3001-TR-ECTHPH-N01	✓	✓	✓	✓	–	–	–	✓	✓	0.95
ZTS-3001-TR-ECTHNPKPH-N01	✓	✓	✓	✓	✓	✓	✓	✓	✓	0.95
ZTS-3002-TR-THNPKPH-N01 *	✓	✓	–	✓	✓	✓	✓	–	–	0.95

SN Puruisenshe

Model	Moist.	Temp.	EC	pH	N	P	K	Salin.	TDS	Conf.
SN-3001-TR-ECTHPH-N01	✓	✓	✓	✓	–	–	–	✓	✓	0.95
SN-3002-TR-ECTHNPKPH-N01 *	✓	✓	✓	✓	✓	✓	✓	✓	✓	0.80

JXCT Weihai JXCT Electronics

Model	Moist.	Temp.	EC	pH	N	P	K	Salin.	TDS	Conf.
JXBS-3001-TR 4-in-1	✓	✓	✓	✓	–	–	–	–	–	0.95
JXBS-3001-TR 7-in-1	✓	✓	✓	✓	✓	✓	✓	–	–	0.95
JXBS-3001-NPK-RS-4	–	–	–	–	✓	✓	✓	–	–	0.95
JXBS-3001-PH-RS	–	–	–	✓	–	–	–	–	–	0.95

DFRobot DFRobot

Model	Moist.	Temp.	EC	pH	N	P	K	Salin.	TDS	Conf.
SEN0600	✓	✓	–	–	–	–	–	–	–	0.95
SEN0601	✓	✓	✓	–	–	–	–	✓	✓	0.95
SEN0602	✓	✓	–	✓	–	–	–	–	–	0.95
SEN0603	–	–	✓	✓	–	–	–	✓	✓	0.95
SEN0604	✓	✓	✓	✓	–	–	–	✓	✓	0.95
SEN0605 †	–	–	–	–	✓	✓	✓	–	–	0.90

Renke Shandong Renke Control Technology

Model	Moist.	Temp.	EC	pH	N	P	K	Salin.	TDS	Conf.
RS-WS-N01-TR	✓	✓	–	–	–	–	–	–	–	0.95
RS-ECTHPH-N01-TR-1	✓	✓	✓	✓	–	–	–	✓	✓	0.95
RS-SD-N01-TR-1	✓	–	–	–	–	–	–	–	–	0.90

Notes

* NPK values are write-in from external instrument, not live probe readings — firmware must not attempt to read NPK registers as agronomic data on these sensors.

† NPK via IEEE754 coefficient model — requires two-register decode per element. Not a simple integer read. Requires special firmware handling generated by the flash.sankhyafarms.com pipeline.

Conf. Confidence score = register map verification confidence. 1.00 = byte-verified from official manufacturer PDF. All sensors shown are ≥ 0.75 and included in the active library.

Key Technical Distinctions

JXCT sensors (JXBS-3001 family) use a fundamentally different register layout from ZTS / SN / Renke. The pH scale is 0.01 (not 0.1); moisture sits at register 0x0012 (not 0x0000); config registers are at 0x0100/0x0101 (not 0x07D0/0x07D1); default baud rate is 9600 (not 4800). These families cannot share firmware profiles and must be handled by separate firmware generations.

Write-in NPK vs live-probe NPK

ZTS-3002 and SN-3002 NPK registers (0x0004–0x0006) are write-in placeholders populated by external instrument, not live soil probe values. Contrast with ZTS-3001-TR-ECTHNPKPH-N01 and JXBS-3001-TR 7-in-1 where NPK is a direct live measurement. Sensors marked * must have NPK reads suppressed in firmware to prevent misleading agronomic data.

DFRobot SEN0605 — IEEE754 NPK decode

The SEN0605 NPK output uses IEEE754 floating-point coefficients distributed across two registers per element. This requires a two-register read and floating-point decode — not the simple integer-divided-by-scale-factor used by all other sensors in this library. The flash.sankhyafarms.com firmware generation pipeline handles this automatically when SEN0605 is selected.

Key Technical Distinctions

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