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relax max entities checking (#2629)

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Martin 2021-10-25 21:53:47 +02:00 committed by GitHub
parent 49b17c5a2d
commit 81c11ba1f7
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1 changed files with 3 additions and 1 deletions
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esphome/components/modbus/modbus.cpp
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@ -139,7 +139,9 @@ void Modbus::send(uint8_t address, uint8_t function_code, uint16_t start_address
uint8_t payload_len, const uint8_t *payload) {
static const size_t MAX_VALUES = 128;
if (number_of_entities > MAX_VALUES) {
// Only check max number of registers for standard function codes
// Some devices use non standard codes like 0x43
if (number_of_entities > MAX_VALUES && function_code <= 0x10) {
ESP_LOGE(TAG, "send too many values %d max=%zu", number_of_entities, MAX_VALUES);
return;
}