From 7bc51582f08817c3e4a41e191131d63f2fd503d1 Mon Sep 17 00:00:00 2001
From: Samuel Sieb <samuel-github@sieb.net>
Date: Wed, 2 Jun 2021 21:13:42 -0700
Subject: [PATCH] make crc16 function accessible (#1857)

---
 esphome/components/modbus/modbus.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/esphome/components/modbus/modbus.h b/esphome/components/modbus/modbus.h
index 91fc55b998..876c46b688 100644
--- a/esphome/components/modbus/modbus.h
+++ b/esphome/components/modbus/modbus.h
@@ -36,6 +36,8 @@ class Modbus : public uart::UARTDevice, public Component {
   std::vector<ModbusDevice *> devices_;
 };
 
+uint16_t crc16(const uint8_t *data, uint8_t len);
+
 class ModbusDevice {
  public:
   void set_parent(Modbus *parent) { parent_ = parent; }