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[improv_serial] Use int8_to_str to avoid heap allocation for RSSI formatting (#13149)

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This commit is contained in:
J. Nick Koston
2026-01-11 17:17:44 -10:00
committed by GitHub
parent 723ca57617
commit 6a3737bac3
1 changed files with 4 additions and 2 deletions
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6
esphome/components/improv_serial/improv_serial_component.cpp
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@@ -267,8 +267,10 @@ bool ImprovSerialComponent::parse_improv_payload_(improv::ImprovCommand &command
if (std::find(networks.begin(), networks.end(), ssid) != networks.end())
continue;
// Send each ssid separately to avoid overflowing the buffer
std::vector<uint8_t> data = improv::build_rpc_response(
improv::GET_WIFI_NETWORKS, {ssid, str_sprintf("%d", scan.get_rssi()), YESNO(scan.get_with_auth())}, false);
char rssi_buf[5]; // int8_t: -128 to 127, max 4 chars + null
*int8_to_str(rssi_buf, scan.get_rssi()) = '\0';
std::vector<uint8_t> data =
improv::build_rpc_response(improv::GET_WIFI_NETWORKS, {ssid, rssi_buf, YESNO(scan.get_with_auth())}, false);
this->send_response_(data);
networks.push_back(ssid);
}