Why do some registers return "nan" instead of a value?

The Negotica gateway publishes registers for all possible smart meter versions. If your meter does not support a specific data object, the register returns "nan". Delete these unused objects from the template to improve polling performance.

What baud rate should I use for Modbus RTU?

The default baud rate is 115200. Make sure both the Negotica gateway and the ModbusCloud gateway are configured to the same baud rate, parity, and stop bit settings.

How often do the register values update?

This depends on the smart meter version. DSMR 5.0 meters typically push new data every 1 second. Older meter versions update every 10 seconds.

Do I need to change the register byte order?

For Modbus RTU the default byte order in the template should work correctly. If you use Modbus TCP, check and verify the "Order of Registers" property on every sensor object, as it may need to be adjusted.

Free Modbus template: Modbus P1 Gateway

Name: Modbus P1 Gateway
Brand: Negotica
SKU: d844d74e-d9bb-4c83-9431-ab4964138a16

The Negotica Modbus P1 Gateway reads data from P1 smart meters commonly used in Belgium, The Netherlands, and Luxembourg. This template exposes electricity, gas, water, and heat meter readings over Modbus RTU at 115200 baud. All registers use float32 format and update every 1 or 10 seconds depending on the smart meter version.

Registers (61)

61 read / 0 write

Name	Address	Function	Type	Unit	Access
000. Version information for P1 output	0	FC04	float32		R
002. Meter Reading electricity delivered to client (Tariff 1) in 0,001 kWh	2	FC04	float32	kWh	R
004. Meter Reading electricity delivered to client (Tariff 2) in 0,001 kWh	4	FC04	float32	kWh	R
006. Meter Reading electricity delivered by client (Tariff 1) in 0,001 kWh	6	FC04	float32	kWh	R
008. Meter Reading electricity delivered by client (Tariff 2) in 0,001 kWh	8	FC04	float32	kWh	R
010. Tariff indicator electricity.	10	FC04	float32		R
012. Actual electricity power delivered (+P) in 1 Watt resolution	12	FC04	float32	kW	R
014. Actual electricity power received (-P) in 1 Watt resolution	14	FC04	float32	kW	R
016. Number of power failures in any phase	16	FC04	float32	count	R
018. Number of long power failures in any phase	18	FC04	float32	count	R
020. Number of voltage sags in phase L1	20	FC04	float32	count	R
022. Number of voltage sags in phase L2	22	FC04	float32	count	R
024. Number of voltage sags in phase L3	24	FC04	float32	count	R
026. Number of voltage swells in phase L1	26	FC04	float32	count	R
028. Number of voltage swells in phase L2	28	FC04	float32	count	R
030. Number of voltage swells in phase L3	30	FC04	float32	count	R
032. Instantaneous voltage L1 in V resolution	32	FC04	float32	V	R
034. Instantaneous voltage L2 in V resolution	34	FC04	float32	V	R
036. Instantaneous voltage L3 in V resolution	36	FC04	float32	V	R
038. Instantaneous current L1 in A resolution.	38	FC04	float32	A	R
040. Instantaneous current L2 in A resolution.	40	FC04	float32	A	R
042. Instantaneous current L3 in A resolution.	42	FC04	float32	A	R
044. Instantaneous active power L1 (+P) in W resolution	44	FC04	float32	kW	R
046. Instantaneous active power L2 (+P) in W resolution	46	FC04	float32	kW	R
048. Instantaneous active power L3 (+P) in W resolution	48	FC04	float32	kW	R
050. Instantaneous active power L1 (-P) in W resolution	50	FC04	float32	kW	R
052. Instantaneous active power L2 (-P) in W resolution	52	FC04	float32	kW	R
054. Instantaneous active power L3 (-P) in W resolution	54	FC04	float32	kW	R
056. The actual threshold Electricity in A	56	FC04	float32	A	R
058. Actual switch position Electricity (in/out)	58	FC04	float32		R
060. Actual switch position Electricity (in/out)	60	FC04	float32		R
062. Text message codes: numeric 8 digits	62	FC04	float32		R
064. Device-Type slave meter 1 (probably gas)	64	FC04	float32		R
066. Last meter reading slave meter 1 (probably gas)	66	FC04	float32	m³	R
068. Last meter reading slave meter 1 (probably gas)	68	FC04	float32	m³	R
070. Valve position (on/off/released) slave meter 1 (probably gas)	70	FC04	float32		R
072. Device-Type slave meter 2	72	FC04	float32		R
074. Last meter reading slave meter 2	74	FC04	float32	m³	R
076. Last meter reading slave meter 2	76	FC04	float32	m³	R
078. Valve position (on/off/released) slave meter 2	78	FC04	float32		R
080. Device-Type slave meter 3	80	FC04	float32		R
082. Last meter reading slave meter 3	82	FC04	float32	m³	R
084. Last meter reading slave meter 3	84	FC04	float32	m³	R
086. Valve position (on/off/released) slave meter 3	86	FC04	float32		R
088. Device-Type slave meter 4	88	FC04	float32		R
090. Last meter reading slave meter 4	90	FC04	float32	m³	R
092. Last meter reading slave meter 4	92	FC04	float32	m³	R
094. Valve position (on/off/released) slave meter 4	94	FC04	float32		R
096. Last Meter reading Gas in 0,001 m3	96	FC04	float32	m³	R
098. Last Meter reading Gas in 0,001 m3 temperature compensated	98	FC04	float32	m³	R
100. Valve position Gas (on/off/released)	100	FC04	float32		R
102. Last meter reading Heat in 0,01 GJ	102	FC04	float32	GJ	R
104. Last meter reading Cold in 0,01 GJ	104	FC04	float32	GJ	R
106. Last meter reading Water in 0,001 m3	106	FC04	float32	m³	R
108. Last value of not temperature corrected gas volume in m3 slave meter 1 (BE)	108	FC04	float32	m³	R
110. Last value of not temperature corrected gas volume in m3 slave meter 2 (BE)	110	FC04	float32	m³	R
112. Last value of not temperature corrected gas volume in m3 slave meter 3 (BE)	112	FC04	float32	m³	R
114. Last value of not temperature corrected gas volume in m3 slave meter 4 (BE)	114	FC04	float32	m³	R
116. Version information (BE)	116	FC04	float32		R
118. Breaker state (BE)	118	FC04	float32		R
120. Fuse supervision threshold (L1) (BE)	120	FC04	float32	A	R

Modbus P1 Gateway

Overview

Key readings

Use cases

Installation

Things to watch for

Registers (61)

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